Abstract
Lattice degeneration is an important predisposing factor for retinal detachment. A cross sectional study of221 patients and 405 eyes with axial myopia of 25mm (–3.oo diopters) or more, was conducted with anobjective to find out prevalence of lattice degeneration of the retina among them. Of 221 patients, 48 (21.7%)had the lattice degeneration consisting of 35 uniocular (72.9%) and 13 binocular patients (27.1%). Of 139males, 36 (25.89%) had lattice degeneration; of 82 females, 12 (14.63%) had lattice degeneration (RR=1.26;95%CI=1.03-1.55; p=0.049). Axial length was from 25mm to 35.77mm (mean=27.63mm, SD 1.98). Thegreatest prevalence of lattice degeneration.9% (16 of 73 eyes) was found in eyes with axial length of 26mmto 26.99 mm (-6.0D to –8.97.0D), and the least incidence was 8.6% (8 of 93 eyes) in eyes with axial length25mm to 25.99 mm (-3.0 D to –5.97.0 D). Over all prevalence of lattice degeneration was 15% (61 of 405eyes) of eye(s) with axial length of 25 mm (-3.0 D) or more. In the age groups below 40 years, the prevalenceof lattice degeneration was highest 85.24% (59 of 61 eyes). The lattice degeneration of retina is moreprevalent in males of age less than 40 years with moderate axial myopia.Key Words: Lattice degeneration, axial myopia, retinal detachment.
Highlights
Lattice degeneration of the retina is an important retinal abnormality, which is related to the retinal detachment (RD)
A fishbone or crosshatched pattern of sclerotic, white retinal arterioles and venules within the base of the lattice degeneration are a frequent finding.[3]. It can be present in association with other several clinical features like localized round, oval, or linear retinal thinning; pigmentation; whitish yellow surface flecks; round, oval, or linear red craters; small atrophic round holes; branching white lines, yellow atrophic spots and rarely tractional tears at the ends or posterior margins of the lesion, which are the frequent cause of retinal detachment.[4]
It is not restricted to eyes with myopia as it was found in emmetropic cases (4.5%)[8] and in hyperopic or emmetropic eyes (25%)[8] Hyams and Newmann[8] reported a 15% incidence of lattice degeneration in 332 eyes with more than one diopter of myopia
Summary
Lattice degeneration of the retina is an important retinal abnormality, which is related to the retinal detachment (RD). The pathogenesis of lattice degeneration is still not well understand. Lattice degeneration is present in approximately 20% of patients with RD9 and in fellow eyes of phakic RD.[10] The prevalence of lattice lesion was found to increase directly with increasing axial length in study by Karline and Curtin,[11] whereas reverse was true in the study by Celorio and Pruett.[12]
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