Increase In Distance Visual Acuity Research Articles

Accommodative ability in patients with strabismic amblyopia at concomitant strabismus

Aim. To study the state of the accommodative ability of amblyopia before and after treatment.
 Materials and methods. One hundred patients (158 eyes) with friendly alternating and monolateral strabismus were examined. The control group consisted of 10 healthy individuals (20 eyes) with emmetropia: the average age of patients under 3 years of age was 2.4 0.15 years, from 3 years to 7 years, 4.8 0.07 years, and above 7 years, 8.3 0.4 years. The vast majority of patients (84 people, 126 eyes) had hyperopic astigmatism, and 16 patients (32 eyes) had a high degree of hyperopia. Twenty-eight patients (40 eyes), 48 patients (84 eyes), and 20 patients (26 eyes) had amblyopia of the 1st, 2nd, and 3rd degrees, respectively. Along with generally accepted methods for examining eyes, the OAA volume and ZAA were determined as the absolute accommodation margin by the proximetric method (AKA-0.1) before and after hardware treatment to relax and stimulate the ciliary muscle.
 Results. The results after treatment revealed a 1.52-fold increase in OAA to 14.4 0.23 D; 13.5 0.10 D; 13.1 0.41 D; and ZAA and a significant 2-fold increase in visual acuity (P 0.001).
 Conclusion. A criterion for the effectiveness of hardware treatment for dysbinocular amblyopia is an increase in OAA and ZAA, accompanied by a 2-fold increase in distance visual acuity (P 0.001).

Refraction and Low Vision Rehabilitation in Patients with Oculocutaneous Albinism

Purpose: To evaluate the types of refractive errors and compliance of patients of Oculocutaneous Albinism (OCA) to low vision aids.
 Study Design: Descriptive observational study.
 Place and Duration of Study: Provincial Directorate of Health, Adana City Education and Research Hospital, from 2010 to 2018.
 Material and Methods: Seven hundred and fifteen patients attended the hospital between 2010 and 2018 with the complaint of low vision and 31 patients with OCA were included in this study by convenient sampling. Best corrected distance and near visual acuity (VA) was measured along with the complete ocular examination. Patients were classified according to low vision and refraction degrees. High degree near eyeglasses, Galilean and Keplerian telescopes, magnifiers and special filter glasses were used as low vision aids (LVA).
 Results: Mean age was 16.45 ± 12.72 years. On admission, mean distance VA was 0.12 ± 0.07 [mean log MAR 0.9], near VA was 1.48M ± 0.74M, astigmatism was 4.02 ± 1.45 diopters (D), and spherical equivalents were 1.54 ± 4.96 D. Hypermetropia was seen more frequently than myopia. Twenty-seven (87%) patients were prescribed telescopes for distance. Near visual acuity increased from 1.4M ± 0.7M to 0.9M ± 0.4M after rehabilitation. There was an increase in distance visual acuity in all patients (p < 0.001). Seventeen (63%) patients bought the telescope, and 15 (55%) patients used the device. The most preferred special filter glasses were 450nm (39%) and 540 nm (25%).
 Conclusion: Astigmatism in oculocutaneous albinism was with the rule and the most commonly detected refractive error was hypermetropia. Patients are non-compliant in buying telescopes in which case tablet and computers with special applications for low vision can be better options.

Independent development of refraction, accommodation and convergence over two years in primary school children

Abstract Purpose: To examine whether age-related changes in refraction covary with changes in parameters describing accommodation and convergence over time in a group of Danish school children. Methods: Two-hundred and seventy-eight unselected Danish school children (7.1-13.9 years) without manifest strabismus were studied at baseline and after two years. Each examination included measurement of distance visual acuity, unilateral cover test, non-cycloplegic autorefraction, monocular amplitude of accommodation, monocular accommodation facility, near phoria, near point of convergence, and positive and negative fusional vergence. The changes in the measured parameters were studied over time, followed by the testing for dependencies in the development of these parameters. Results: After two years there was a significant increase in distance visual acuity (p=0.04), monocular accommodation facility (p<0.001), near point exophoria (p=0.04), near point of convergence (p=0.01), and fusional range (p<0.001), a significant reduction in hyperopia (p=0.01) and monocular amplitude of accommodation (p<0.001), while the midpoint of the fusional range changed significantly towards convergence (p<0.001). The increase in near point of convergence correlated significantly with the decrease in monocular amplitude of accommodation (p<0.001) and the convergent shift in the midpoint of the fusional range was significantly correlated with a larger fusional range (p<0.001). The changes in all other parameters were independent. Conclusions: The development of refraction, accommodation, and convergence parameters in school children over two years are independent. This may be due to separate processes regulating development, and suggests that therapeutic intervention may be performed on each of the parameters individually without a derived effect on the other parameters.

Intravitreal triamcinolone for persistent cystoid macular oedema in eyes with quiescent uveitis

To determine the outcome following injections of triamcinolone acetate (IVTA) in the treatment of persistent cystoid macular oedema (CMO) in quiescent, non-infectious uveitis. Retrospective analysis of patients with inactive uveitis requiring/not requiring immunosuppressive therapy who received IVTA because of chronic CMO refractory to previous systemic steroids. Number of IVTA (re-)treatments, distance visual acuity, near visual acuity, mean foveal thickness, intraocular pressure, duration of CMO, type of uveitis and systemic therapy were assessed previous to and 1, 4, 12 weeks following each IVTA treatment. Between March 2003 and May 2006, 24 eyes of 18 patients received between one and three IVTA injections. A resolution of chronic CMO was observed in 7/24 eyes (29.2%, 5 eyes after single injection of IVTA, 1 eye each after two and three injections of IVTA), a significant increase in distance visual acuity in 9/24 eyes (37.5%; 5 eyes with resolution of CMO, 4 eyes despite persistent CMO) and in near visual acuity in 13/24 eyes (54.6%; 6 eyes with resolution of CMO, 7 eyes despite persistent CMO). IVTA might be considered as a treatment for patients with chronic CMO when persistent despite previous systemic steroid therapy. Even patients without sustained resolution of CMO after IVTA might benefit in terms of transiently increasing visual acuity, but progression of cataract and rise in intraocular pressure limit repeatability.