Location Of Visual Field Defects Research Articles

Peripapillary Versus Macular Thinning to Detect Progression According to Initial Visual Field Loss Location in Normal-Tension Glaucoma

PurposeTo investigate the predictive capabilities of peripapillary retinal nerve fiber layer (pRNFL) and macular ganglion cell-inner plexiform layer (mGCIPL) thinning to detect visual field (VF) progression in normal-tension glaucoma patients with an initial parafoveal scotoma (IPFS) or nasal step (INS). DesignRetrospective cohort study. Methods185 early-stage glaucoma eyes, followed for 10 years, were retrospectively stratified into IPFS and INS groups. Progressive pRNFL and mGCIPL thinning were assessed using spectral-domain optical coherence tomography and VF progression using both event- or trend-based analysis. Kaplan-Meier survival analysis compared VF survival in each VF phenotype with or without progressive pRNFL and mGCIPL thinning. Cox proportional regression analysis identified VF progression factors. ResultsVF progression was detected in 42 IPFS (n=86) and 47 INS (n=99) eyes. Among VF progressors, pRNFL thinning was significantly faster in INS group compared to IPFS group (P < 0.01), while mGCIPL thinning was similar (P = 0.16). At five years, eyes with progressive mGCIPL thinning showed significantly lower VF survival in both VF phenotypes (all P < 0.05). Progressive pRNFL thinning showed significantly lower VF survival only in INS eyes (P = 0.015). Cox multivariate regression revealed that mGCIPL thinning predicted subsequent VF progression in IPFS eyes, while mGCIPL and pRNFL thinning had significant associations with VF progression in INS eyes. ConclusionsmGCIPL outperforms pRNFL at early follow-up in detecting VF progression in IPFS eyes but not INS eyes. Appropriate selection of structural parameters (mGCIPL vs pRNFL) maximizes early VF progression detection according to initial VF defect location.

Comparison of perimetric 24-2 and 30-2 test patterns in detecting visual field defects in patients with tumours in the pituitary region.

Automated perimetry provides a standardized method of measuring the visual field. The Humphrey Field Analyser (HFA) uses the 24-2 test pattern to cover 24 degrees centrally or the 30-2 test pattern to cover a slightly broader region of 30 degrees. The aim of this study was to determine whether the 24-2 test pattern provides comparable information to the 30-2 test pattern in detecting visual field defects in patients with tumours in the pituitary region. A retrospective cohort study was carried out on patients with tumours in the pituitary region and radiologically confirmed compression of the visual pathway. Included patients (79 of 133) had been examined using the Humphrey 30-2 visual field test, after which the 30-2 test patterns were reduced into corresponding 24-2 test patterns. The location of visual field defects, visual acuity and the perimetric parameters mean deviation (MD) and visual field index (VFI) were also recorded. No patient was classified differently when evaluated with the 24-2 test pattern, compared to the 30-2 test pattern. Interestingly, although the majority of patients had visual field defects located in the temporal visual field of each eye, a significant minority did not. In addition, it was found that a large proportion of patients had normal visual acuity (≥0.8). The use of the HFA 24-2 test pattern reliably detected visual field defects in patients with tumours in the pituitary region. The present study indicates that MD and VFI are not reliable parameters for evaluating visual field defects due to compression.

Lamina Cribrosa Morphology in Normal-tension Glaucoma According to the Location of Visual Field Defects.

The morphological alterations in lamina cribrosa may be related to the location of visual field defects. The aim of this study was to investigate morphologic differences in the lamina cribrosa (LC) in normal-tension glaucoma (NTG) according to the location of visual field (VF) defects. This study was a retrospective, cross-sectional study. Ninety-six eyes of 96 patients with NTG were included in this study. The patients were divided into two groups according to the location of VF defects (parafoveal scotoma [PFS] and peripheral nasal step [PNS]). All patients underwent an optical coherence tomography (OCT) of the optic disc and macula using swept-source OCT (DRI-OCT Triton; Topcon, Tokyo, Japan). The parameters of the optic disc, macula, LC, and connective tissues were compared between the groups. The relationships between the LC parameters and other structures were analyzed. The temporal peripapillary retinal nerve fiber layer, average macular ganglion cell-inner plexiform layer, and average macular ganglion cell complex were significantly thinner in the PFS than in the PNS group (P<0.001, P<0.001, and P=0.012, respectively). The PFS group showed a more glaucomatous LC morphology with a smaller lamina cribrosa-global shape index (LC-GSI, P=0.047), more LC defects (P=0.034), and thinner LC (P=0.021) than the PNS group. LC-GSI was significantly correlated with LC thickness (P=0.011) but not with LC depth (P=0.149). In patients with NTG, those with initial PFS showed a more glaucomatous LC morphology than those with initial PNS. The morphological differences in LC may be related to the location of the VF defects.

Contrast sensitivity in glaucoma patients with visual field defects at different locations

Contrast sensitivity (CS) is closely associated with vision-related quality of life in glaucoma patients. This cross-sectional study was performed to determine the relationship between CS and visual field (VF) sensitivity (VFS) according to the hemifield location of VF defects in 238 patients with primary open-angle glaucoma (POAG) who underwent 24-2 standard automated perimetry and CS measurement on the same day. Of the 238 eyes, 83, 58, and 47 eyes had VF defects in the superior, inferior and both hemifields, respectively, and 50 had no VF defects in either hemifield. Significant correlations between CS and VFS in all sectors were observed in the entire cohort (R2 = 0.103–0.315, all P < 0.001). However, CS poorly represented VF defects in eyes with single superior (R2 = 0.037–0.086) or inferior (R2 = 0.107–0.222) hemifield defects. Eyes with bi-hemifield VF defects showed significant correlations between VFS and CS at 0.3 m in all sectors (R2 = 0.200–0.406), but the correlation between VFS and CS at 5 m was significant only in the inferior sector (R2 = 0.224–0.348 vs. 0.081–0.126 in the inferior and superior sectors, respectively). Correlations between CS and VFS were dependent on CS distances and the presence of bi-hemifield VF defects. Although CS may not correlate with VFS in eyes with single-hemifield VF defects, it may reflect visual disability in eyes with bi-hemifield defects.

Результаты анализа сетчатки при сочетанной патологии миопии средней степени и возрастной макулярной дегенерации. Подходы к лечению

Aim: to assess retinal status in comorbid ocular disorders (moderate myopia and age-related macular degeneration/AMD of various stages) using modern diagnostic tools. Patients and Methods: 48 patients (96 eyes) with moderate myopia and dry AMD were enrolled. Best-corrected visual acuity (BCVA), mean deviation/MD (characterizes mean reduction of sensitivity), pattern standard deviation/PSD (characterizes the severity of local visual field defects), central macular thickness (CMT), and axial length (AL) were measured. The macular zone was investigated by optical coherence tomography (OCT) using B scan and fundus autofluorescence (FAF) regimens. Results: in moderate myopia associated with dry AMD (AREDS categories 1,2,3), a significant reduction in the mean BCVA (20/25) was detected in 54.2% (26 patients, 52 eyes). Retinal photosensitivity indices (MD and PSD) were also significantly reduced to 2.19 dB (р&lt;0.001) and 2.14 dB (р&lt;0.001), respectively. AL was significantly increased (25.11 mm, р&lt;0.001). No significant differences in CMT values were revealed (233 mcm, p=0.123). In comorbid ocular disorders, severe defects and focuses of RPE atrophy, extensive areas of the IS/OS junction line damage, and drusen are seen among morphological abnormalities of the eye fundus. FAF identified certain pathological patterns, e.g., focal hypo- and hyperautofluorescence, hyperautofluorescent halo at the border of staphyloma, linear hypoautofluorescent bands surrounded with hyperautofluorescence, reticular pattern, patches, focal and multifocal areas of geographic atrophy. Conclusion: our findings on visual field loss (MD, PSD) in AMD depending on stage and OCT findings in AMD are in line with the results of other authors. Meanwhile, we investigated a comorbid variant (AMD in association with moderate myopia), compared morphological and functional parameters, and addressed the relevance of FAF. Keywords: myopia, age-related macular degeneration, optical coherence tomography, autofluorescence. For citation: Moshetova L.K., Alekseev I.B., Vorob’eva I.V., Nam Yu.A. Retinal status in moderate myopia and age-related macular degeneration. Management strategies. Russian Journal of Clinical Ophthalmology. 2022;22(2):91–98 (in Russ.). DOI: 10.32364/2311- 7729-2022-22-2-91-98.

Evaluation of blood vessel network formation and visual field defect in optic disc melanocytoma

AimTo investigate the association between visual field defects and blood vessel network (BVN) formation in optic disc melanocytomas (ODMs) using optical coherence tomography angiography (OCTA).MethodsSingle-centre, retrospective case series of 32...

Disc-fovea Angle Is Associated With Visual Field Defect Location in Patients With Glaucoma.

The current study showed that glaucomatous eyes from patients with central visual field defects presented less negative disc-fovea angle compared with patients with peripheral defects. The purpose of this study was to investigate the relationship between disc-fovea angle and visual field defect location in patients with glaucoma. This was a cross-sectional study including glaucoma patients divided into isolated central and isolated peripheral scotoma groups. The main outcome measure was disc-fovea angle measurement between groups. Secondary outcomes included disc-fovea distance, vertical disc diameter, and fovea vertical deviation. We included 50 glaucoma patients (50 eyes; 27 with central scotoma and 23 with peripheral scotoma). Mean deviation from visual fields was -3.05±1.67 and -2.95±1.49 dB (P=0.829) (central and peripheral scotoma groups, respectively). We found that eyes in the central group had lower values of disc-fovea angle (-5.85±2.67 vs. -7.97±2.26 degrees, P=0.004), shorter disc-fovea distance (4.38±0.70 vs. 4.98±0.78 mm, P=0.006), and shorter fovea vertical deviation (-0.43±0.19 vs. -0.68±0.22 mm, P<0.001) compared with eyes in the peripheral group. This study showed an association between disc-fovea angle and central visual field defects in patients with glaucoma. Our findings suggest that eyes with a less negative disc-fovea angle should undergo a more careful investigation of the central visual field, even at early stages of the disease.

Structure-function correlation of localized visual field defects and macular microvascular damage in primary open-angle glaucoma

PurposeTo investigate regional alterations of macular microvasculature in primary open-angle glaucoma (POAG), and to determine the structure-function correlation between localized visual field defects and macular microvascular damage in matching sectors. MethodsFifty-eight patients with POAG and 27 normal controls were recruited for this study. Optical coherence tomography angiography (OCTA) was used to measure retinal vascular microcirculation of the macula in superior, inferior, temporal, and nasal sectors. Visual field (VF) was tested using automated perimeter. Sensitivities of 16 central points of the VF were selected and divided into the 4 previously mentioned sectors. Structure-function correlation analysis was performed between localized visual field defects and the matching macular microvasculature damage. The relationship was also assessed using a previously described model. ResultsThe temporal vascular density was thinner than those of the superior and inferior positions of parafovea in the control group (P < 0.05). Vascular densities in all sectors were decreased in the POAG group compared with the normal control group (P < 0.05). The structure-function correlation coefficients between sectors of VF sensitivity and the matched vascular densities ranged from 0.295 to 0.433 (P < 0.01). The coefficient of determination between OCT derived vascular density measurements and the estimates using the previous model ranged from 0.08 to 0.19. The best fit was in the inferior sector. ConclusionsCompared with age-matched control subjects, vascular density of the parafoveal retina decreased in the POAG subjects. There is a moderate structure-function correlation between visual field sensitivity thresholds measured with automated perimeter and macular vascular density assessed by OCT.

Optical Coherence TomographyStudy of peripapillary Nerve Fiber layer ThicknessinThyroid Associated Ophthalmopathy

Abstract Background Thyroid Associated Ophthalmopathy (TAO) or Graves Opthalmopathy (GO) is a very common autoimmune disorder of the thyroid gland which activates the gland function and result in hyperthyroidism. Some patients with graves disease(GD) develop localized manifestations including GO and dermopathy. Dysthyroid optic neuropathy (DON) is impairment of optic nerve function due to GO, the most serious complication of GO which occurs in about 4–8% of patients, it occurs due to ischemia and inflammation of the optic nerve, also compression of the optic nerve due to enlargement of extraocular muscles at the apex of orbit. Objective To assess peripapillary retinal nerve fiber layer (pRNFL) thickness in GD and to correlate it with the severity of the disease. Patients and Methods This study was conducted on 40 eyes of 21 recently diagnosed GO patients (two patients were single eyed) recruited from Endocrinology clinic and examined at Ophthalmology clinic, Ain Shams University Hospital in the period from March 2018 to September 2018. Complete ophthalmologic examination, proptosis assessment of direction and degree, Visual Field (VF) examination, clinical activity score (CAS), severity score assessment and Optical Coherence Tomography (OCT) were performed to all patients . Results In the whole group of patients; the mean average pRNFL was 109.53 um ± 12.33 SD (range: 86 – 140), median MD was -4.53 (range:-0.66 to-18.95) and -8.04 ± -2.15 SD, mean PSD was 5.55 ± 3.8 SD (range: 1.11 to 12.73). Normal average pRNFL thickness (according to normative data base included in the OCT program) was found in 15 eyes (37.5%) and those had abnormal increase in thickness was 12 eyes (30%). Abnormal decrease in thickness was detected in 13 eyes (32.5%). Conclusion PRNFL thickness abnormalities were detected in 25 eyes (62%) of recently diagnosed GO patients. This might be associated with localized visual field defects. Regular follow up of intra ocular pressure (IOP), serial VF examinations, are required to decide further management of those patients, as OCT results were correlated with degree of eye protrusion and the severity of the disease (CAS and severity score).

Topographic correlation and asymmetry analysis of ganglion cell layer thinning and the retinal nerve fiber layer with localized visual field defects

PurposeTo evaluate the accuracy of the measurement of the ganglion cell layer (GCL) of the posterior pole analysis (PPA) software of the Spectralis spectral-domain (SD) optical coherence tomography (OCT) device (Heidelberg Engineering, Inc., Heidelberg, Germany), the asymmetry of paired GCL sectors, the total retinal thickness asymmetry (RTA), and the peripapillary retinal nerve fiber layer (pRNFL) test to discriminate between healthy, early and advanced glaucoma eyes.MethodsThree hundred eighteen eyes of 161 individuals with reliable visual fields (VF) were enrolled in this study. All participants were examined using the standard posterior pole and the pRNFL protocols of the Spectralis OCT device. VF impairment was graded in hemifields, and the GCL sectors were correlated with this damage. Thicknesses of each GCL, the GCL map deviation asymmetry and the pRNFL were compared between control and glaucomatous eyes. The area under the receiver operating characteristic curve (AUC) of these analyses was assessed.ResultsFourteen of the 16 sectors of the GCL and pRNFL were significantly thinner in eyes with glaucoma than in control eyes (p<0.006). Similarly, the GCL map deviation showed a significant difference between these eyes and both the control eyes as well as the eyes with early glaucoma (p = 0.001 and p = 0.039, respectively). The highest values of AUC to diagnose both early and advanced glaucoma corresponded to the average pRNFL analysis and the GCL map deviation (AUC>0.823, p<0.040 and AUC>0.708, p<0.188, respectively).ConclusionsAlthough 16 central sectors of the GCL observed with PPA showed good correlation with VF damage, the pRNFL and the GCL map deviation were more effective for discrimination of glaucomatous damage.

Comparison of pattern electroretinograms of glaucoma patients with parafoveal scotoma versus peripheral nasal step

Retinal ganglion cells are distributed disproportionately with retinal eccentricity. Pattern electroretinogram (PERG) stimuli resulted in reduced responses with more eccentric stimuli. Therefore, we investigated whether PERG amplitude is associated with the location of visual field (VF) defect in primary open-angle glaucoma. Data from Twenty-nine glaucoma patients with a parafoveal scotoma (PFS) within the central 10° of fixation, 23 glaucoma patients with a peripheral nasal step (PNS), and 27 normal control subjects were analyzed in this study. Electroretinograms (ERGs) were obtained using a commercial ERG stimulator (Neuro-ERG). The thickness of the ganglion cell-inner plexiform layer (GCIPL) was measured using spectral-domain optical coherence tomography. A lower N95 amplitude was observed in both PFS and PNS compared to the normal control (Both P < 0.001). The N95 amplitude of the PFS group was significantly lower than that of the PNS group (P = 0.034). Average GCIPL thickness correlated positively with N95 amplitude (r = 0.368, P = 0.002), but did not correlate significantly with global mean sensitivity (r = 0.228, P = 0.073) or mean deviation on 24-2 standard automated perimetry (r = 0.173, P = 0.176). In conclusion, parafoveal VF defects were associated with the lower PERG amplitude. Therefore, it is necessary to take into account the location of VF defects in evaluating PERGs of glaucoma patients.

Structural evaluation of perimetrically normal and affected hemifields in open angle glaucoma

Purpose:To study macular ganglion cell layer-- inner plexiform layer complex (GCL + IPL) in relation to peripapillary retinal nerve fiber layer (RNFL) in glaucomatous eyes with superior or inferior hemifield defects (HD) and to study structural configuration in normal hemifield.Methods:This was an observational cross-sectional study. Data from consecutive 45 superior HD (SHD) and 50 inferior HD (IHD) eyes were analyzed. Each patient underwent detailed ocular examination, standard automated perimetry, and spectral domain optical coherence tomography (SD-OCT). After adjusting for age, gender, and signal strength, area under receiver operating characteristic curve (AUC) was calculated to determine diagnostic ability of GCL + IPL and peripapillary RNFL. Apparently normal hemifield was compared with true normal hemifield. Data were analyzed with SPSS, analysis of variance, t-test, Chi-square test, and receiver operating curve.Results:In the SHD glaucoma group, best parameters for discriminating normal eyes from glaucomatous eyes were inferotemporal GCL + IPL thickness (0.935) and inferior quadrant RNFL thickness (0.971). For IHD glaucoma, average GCL + IPL thickness (0.877) and average RNFL thickness (0.950) had best AUC values. When evaluating apparently normal hemifield in both groups, statistically significant difference was found in inferior GCL + IPL sector (0.865) and inferior quadrant RNFL (0.883) in IHD and superonasal GCL + IPL (0.725) and superior quadrant RNFL (0.842) in SHD groups.Conclusion:SD-OCT may be a useful ancillary diagnostic tool for evaluation of early macular and circumpapillary structural changes in glaucomatous eyes with localized visual field defects. Apparently normal hemifields show structural damage and should be considered in management of glaucoma.

Glaucoma and quality of life: fall and driving risk.

Numerous population-based studies suggest that glaucoma is an independent risk factor for falling and motor vehicle collisions, particularly for older adults. These adverse events lead to increased healthcare expenditures and decreased quality of life. Current research priorities, therefore, include identifying factors that predispose glaucoma patients to falling and unsafe driving, and developing screening strategies and targeted rehabilitation. The purpose of this article is to review recent studies that address these priorities. Studies continue to support that glaucoma patients, particularly those with advanced disease, have an increased risk of falling or unsafe driving. Risk factors, however, remain variable and include severity and location of visual field defects, contrast sensitivity, and performance on divided attention tasks. Such variability is likely because of the multifactorial nature of ambulating and driving and compensatory strategies used by patients. Falls and unsafe driving remain a serious public health issue for older adults with glaucoma. Ambulation and driving are complex tasks and there is no consensus yet, regarding the best methods for risk stratification and targeted interventions to increase safety. Therefore, comprehensive and individualized assessments are recommended to most effectively evaluate a patient's risk for falling or unsafe driving.

Glaucoma Diagnostic Capabilities of Foveal Avascular Zone Parameters Using Optical Coherence Tomography Angiography According to Visual Field Defect Location.

To assess the diagnostic ability of foveal avascular zone (FAZ) parameters to discriminate glaucomatous eyes with visual field defects (VFDs) in different locations (central vs. peripheral) from normal eyes. Totally, 125 participants were separated into 3 groups: normal (n=45), glaucoma with peripheral VFD (PVFD, n=45), and glaucoma with central VFD (CVFD, n=35). The FAZ area, perimeter, and circularity and parafoveal vessel density were calculated from optical coherence tomography angiography images. The diagnostic ability of the FAZ parameters and other structural parameters was determined according to glaucomatous VFD location. Associations between the FAZ parameters and central visual function were evaluated. A larger FAZ area and longer FAZ perimeter were observed in the CVFD group than in the PVFD and normal groups. The FAZ area, perimeter, and circularity were better in differentiating glaucomatous eyes with CVFDs from normal eyes [areas under the receiver operating characteristic curves (AUC), 0.78 to 0.88] than in differentiating PVFDs from normal eyes (AUC, 0.51 to 0.64). The FAZ perimeter had a similar AUC value to the circumpapillary retinal nerve fiber layer and macular ganglion cell-inner plexiform layer thickness for differentiating eyes with CVFDs from normal eyes (all P>0.05, the DeLong test). The FAZ area was significantly correlated with central visual function (β=-112.7, P=0.035, multivariate linear regression). The FAZ perimeter had good diagnostic capability in differentiating glaucomatous eyes with CVFDs from normal eyes, and may be a potential diagnostic biomarker for detecting glaucomatous patients with CVFDs.

Sub-classification of myopic glaucomatous eyes according to optic disc and peripapillary features.

PurposeTo investigate the sub-classification of myopic glaucomatous eyes by optic disc and peripapillary features.MethodsOptic disc tilt and torsion were determined from retinal nerve fiber layer photographs. Based on the location of the Bruch’s membrane (BM) opening within the β-zone of the peripapillary atrophy (PPA) area, the widths of β-zone PPA (PPA1W), PPA+BM (PPA2W), and PPA-BM (PPA3W) were measured with enhanced depth imaging spectral-domain optical coherence tomography. Cluster analysis that employed partitioning around medoids was performed with these parameters, the presence of inward rotation of BM ending axial length (AXL), and central corneal thickness.ResultsA total of 115 eyes (AXL≥24 mm) were included. Two clusters produced maximum overall silhouette widths (average = 0.43). Visual field (VF) mean deviation was not different between cluster 1 (52 eyes; -4.02±3.01 dB) and cluster 2 (63 eyes; -5.21±5.62 dB; p = 0.174). In cluster 1 compared to cluster 2, optic disc tilt was significantly greater, PPA1W and PPA3W were longer, and AXL was longer (all p<0.001). The presence of an inward rotation of BM ending was more frequent in cluster 2 (p = 0.043). Forty-one eyes (78.8%) in cluster 1 had superior VF defects while 10 eyes (19.2%) had inferior defects, and only one eye (2%) had defects in both hemifields. Eyes in cluster 2 were more evenly distributed: 55.6% had superior defects, 34.9% had inferior defects, and 9.5% had defects in both hemifields (p = 0.023).ConclusionsMyopic glaucomatous eyes characterized by optic disc and peripapillary configurations can be classified as two distinct types, and the most distinct difference between the two was degree of optic disc tilt and width of PPA. The location of VF defects were also significantly different between two clusters.

Quality of Life According to Location of Integrated Binocular Visual Field Defect in Normal-Tension-Glaucoma Patients

Purpose: To investigate the relationship between vision-related quality of life (QOL) and integrated binocular visual field (IVF) defect and the difference in QOL based on the location of visual field defects in Korean normal tension glaucoma (NTG) patients. Methods: Two hundred monocular visual fields from 100 patients diagnosed with normal tension glaucoma in at least one eye were integrated using the best location method, and the mean deviation (MD) of whole, superior, and inferior IVF was calculated. We analyzed the correlations between subscales of the National Eye Institute Visual Function Questionnaire 25 (NEI VFQ-25) and each calculated MD using Spearman correlation. After adjusting for confounding factors of age, visual acuity of the better eye, number of medications, and education level, the impact of IVF loss on the composite score of the NEI VFQ-25 was evaluated using multivariate linear regression analysis. Results: The MDs of whole and inferior IVF were significantly associated with 7 of 12 NEI VFQ-25 subscales, and the superior IVF was associated with 3 subscales (p < 0.05). After adjusting confounding variables, the composite score of the NEI VFQ-25 showed significant correlation with whole, superior, and inferior IVF. The adjusted R and β coefficient of the regression line were highest in the whole IVF (Adjusted R = 0.451, β = 1.12), followed by the inferior and superior IVF (Adjusted R = 0.438, 0.395, β = 0.95, 0.85). Conclusions: The IVF of Korean NTG patients can effectively reflect patient QOL, and the inferior IVF was significantly associated with more subscales of NEI VFQ-25 than was the superior IVF. However, overall QOL of patients is thought to be determined by severity of visual field loss rather than its location. J Korean Ophthalmol Soc 2016;57(1):86-97

Current research of acute zonal occult outer retinopathy

Acute zonal occult outer retinopathy (AZOOR) is a relatively rare ocular disease that is characterized by the rapid loss of one or more zones of outer retinal function. AZOOR usually occurs in young women. AZOOR patients typically present with the sudden onset of photopsia and acute scotomas related to loss of sectors of outer retinal function. Early in the course of AZOOR, funduscopic appearance was often normal; however, most patients developed zones of retinal pigment epithelial atrophy or pigment clumping over time. Changes in electroretinogram (ERG) and persistent visual field defects were usually observed. Optical coherence tomography (OCT) showed that inner segment (IS)/outer segment (OS) regional abnormal changes corresponding to the visual field defect location area, at the same time the morphology and position of the visual field defect and multifocal electroretinogram (mfERG) shown in retinal amplitude density decreased regions coincide. The visual function of some patients can permanently damage. Fundus examination, mfERG and fluorescein angiography (FA), indocyanine green angiography (ICGA), autofluorescence (AF) and frequency domain OCT imaging techniques has an important significance for the diagnosis of AZOOR. Ever since the lack of understanding, AZOOR is often missed or misdiagnosed. In order to improve the understanding of the disease, this paper reviewed the definition, etiology, the epidemiological characteristics, clinical manifestation, classification, diagnosis, differential diagnosis, treatment and prognosis of AZOOR. Key words: Acute zonal occult outer retinopathy; Retinal diseases; Photopsia; Scotomas

Transient but Significant Visual Field Defects after Robot-Assisted Laparoscopic Radical Prostatectomy in Deep Trendelenburg Position

BackgroundRobot-assisted laparoscopic radical prostatectomy (RALP) is a minimally invasive surgical procedure for prostate cancer. During RALP, the patient must be in a steep Trendelenburg (head-down) position, which leads to a significant increase in intraocular pressure (IOP). The association of RALP with visual field sensitivity, however, has not been prospectively studied. The purpose of this study was to evaluate prospectively the visual field, retinal nerve fiber layer (RNFL) thickness, and optic disc morphology in 50 normal eyes of 25 male patients that underwent RALP.MethodsThe subjects were 25 males among 33 consecutive patients who underwent uneventful RALP under general anesthesia in our hospital. Visual field tests using the Humphrey visual field analyzer 30-2 SITA-standard program were performed before, 7 days after, and 1-3 months after RALP. IOP was measured before, during, and after RALP; and ophthalmologic examinations, including slit-lamp, fundus examination, and optical coherence tomography (OCT), were scheduled before and 7 days after surgery.ResultsIOP was significantly increased during RALP up to 29.4 mmHg (P<0.01). Postoperative local visual field defects were detected in 7 eyes of 7 subjects dominantly in the lower hemifield without abnormal findings in the optic nerve head or retina, and the visual field recovered to normal within 3 months after surgery. General factors associated with RALP, IOP, RNFL thickness, or optic disc parameters did not differ significantly between eyes with and without postoperative visual field defects, and parameters of OCT measurements were not altered after surgery.ConclusionTransient but significant unilateral visual field defects were found in 28% of the subjects examined. The probable cause are the increased IOP and altered perfusion during surgery and ophthalmologic examinations are therefore suggested before and after RALP.

Retinal Nerve Fiber Layer Loss Is Associated with Urinary Albumin Excretion in Patients with Type 2 Diabetes

To identify the factors associated with retinal nerve fiber layer (RNFL) loss in patients with type 2 diabetes. Cross-sectional study. Ninety-six nonglaucomatous patients with type 2 diabetes without renal impairment (estimated glomerular filtration rate, ≥60 ml/minute per 1.73 m(2)). Eyes were divided into 2 groups based on the presence or absence of RNFL defects detected by red-free retinal fundus photography. All participants underwent an eye fundus examination, and the urinary albumin-to-creatinine ratio (ACR) was determined. A cardiovascular autonomic function test was performed using the following heart rate variability parameters: expiration-to-inspiration ratio, response to the Valsalva maneuver, and standing. Multiple logistic regression analyses were performed to determine potential risk factors related to the presence of RNFL defects in these patients. The association between RNFL defects and diabetic complications. Among the patients, 43 (44.8%) had localized RNFL defects (group 1), whereas the others (55.2%) did not (group 2). The RNFL defects occurred more frequently on the superior side (75.6% and 71.0% in right and left eyes, respectively) compared with the inferior side (13.8% and 0.0% in right and left eyes, respectively). Patients with RNFL defects (group 1) had significantly higher rates of diabetic retinopathy (60.5%) compared with those without RNFL defects (group 2; 32.1%; P = 0.007). The urinary ACR was significantly higher in patients with RNFL defects than in those without defects (45.3±72.1 μg/mg vs. 15.4±17.3 μg/mg creatinine, respectively; P = 0.015), whereas autonomic function test grading was similar between the groups. The urinary ACR was the only factor related to visual field defect location in both univariate (P = 0.021) and multivariate (P = 0.036) logistic regression analyses after adjusting for age; gender; presence of diabetic retinopathy; diabetes duration; smoking; statin use; and antiplatelet, angiotensin-converting enzyme inhibitor or angiotensin receptor blocker treatment. Urinary albumin excretion was associated with nerve fiber layer loss in patients with type 2 diabetes. Careful examination of the optic nerve head may be necessary, particularly in patients with type 2 diabetes exhibiting albuminuria.

Correlation of localized glaucomatous visual field defects and spectral domain optical coherence tomography retinal nerve fiber layer thinning using a modified structure-function map for OCT.

To study the correlation between glaucomatous visual field (VF) defects assessed by standard automated perimetry (SAP) and peripapillary retinal nerve fiber layer (RNFL) thinning measured by spectral domain optical coherence tomography (OCT) using a modified OCT-based peripapillary RNFL structure-function map. Perimetric glaucoma patients and age-matched normal control subjects were recruited from a university hospital clinic. All eyes underwent testing with the Spectralis spectral domain OCT and SAP on the same day. An OCT-based correspondence map, which correlated VF areas with peripapillary RNFL sectors was created to evaluate the relationship between glaucomatous RNFL thinning and VF loss in six nerve fiber layer bundle areas. Correlations of RNFL thinning with corresponding VF defects were examined using Spearman rank-order correlations. To demonstrate the association between localized VF defects and RNFL thickness, the theoretical curves were made according to an established log-linear model. The measured RNFL thickness values and VF defects were presented in the same scatterplot for each sector. Fifty-six glaucoma patients and 85 normal subjects were included in the study. Significant association between localized VF loss and RNFL thinning was found in corresponding areas. Data from the current study fit well with established log-linear models, which compare RNFL thickness values with VF defects. Analysis of RNFL thinning in eyes with localized glaucomatous VF defects showed good structure-function correlation in a new OCT-based structure-function correspondence map.