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Yining Shi, Yanming Chen, Ji Liu; Evaluation on the changes of 90 degree visual field defects accompanied peripheral retinal degenerative lesions in high myopic eye----the roles in following-up and prophylaxis in retinal detachment.. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2171.
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To observe the relationship between peripheral retinal degenerative changes in high myopic eyes and 90 degree visual fields defects, and the influence with the refractive and aging factors. We performed a retrospective, observational clinical study to provide a safer prophylactic treatment of retinal detachment (RD).
360 cases of high myopia were tested by LVP, OCTOPUS 101 perimeter. and compared with the 161 fellow eyes of high myopia with RD, 118 eyes of high myopia with RD, 41 fellow eyes of low myopia with RD, 54 eyes of low myopia with RD, and 108 normal eyes.High risk RD eyes were treated by defined equatorial pan-retinal photocoagulation, at meantime detected the visual field changes and posterior vitreous detachment(PVD) developing, post-treated complications.
The 90 degree mean light sensitivity (MS) of high myopia eyes was (21.34±5.40)dB (Fig. 1). The MS in high myopia was declined with aging and severity of myopia, the linear regression formula was R=32.981-0.161ages+0.468 diopters.There was definite co-relationship with 2 kinds of visual defect and the degenerations: 1. The peripheral absolute defects, related with lattice degeneration; 2. The peripheral MS declining, with white-without-pressure.Following 32 to 74 months after the defined equatorial pan-retinal photocoagulation,there were complete PVD formation observed under split lamp with 90°Volk pre-set lens (Fig. 2), and there were no significant changes between the MSs pre- and post treatment.
There are linear relations with MS and aging, myopic degree. The MS may indicate the peripheral degenerative lesions and its degrees, played a roles in following-up and prophylaxis in retinal detachment.The defined equatorial pan-retinal photocoagulation is a safer, effective intervene for prophylaxis of retinal detachment and forming iatrogenous PVD.
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