The Amounts of Horizontal Ocular Movement in Korean People and Comparison According to Methods of Measurement

PURPOSE: To estimate and standardize horizontal ocular movement of normal Korean people and, to adapt correlations among three Methods for clinical approach. METHODS: This study investigated the amounts of horizontal ocular movement in normal Korean people whose age was ranged from 20 to 79 (50 persons in each age decades) by the lateral version light reflex Method, the limbus test of motility and the imaginary vertical line Method, and compared relationships among the amounts measured with above three Methods by Spearman correlation coefficient. The study subjects were three hundred people who visited Dept. of Ophthalmology at Gyeongsang National University Hospital, whose best corrected visual acuity was no less than 20/50 Snellen visual acuity chart, who had no history of ophthalmic operation and diseases, whose age was ranged from 20 years to 79 years (50 persons in each age decades). RESULTS: In imaginary vertical line Method, the excessive ocular movements were more frequent in younger people than in elder people. With age the proportion of the excessive ocular movement was gradually decreased and that of the normal ocular movement was increased until 6th decades. With other two Methods, the amounts of horizontal ocular movement was higher in younger ages than in elder ages and they decreased with aging. There were significantly moderate correlation (rs = - 0.54 to - 0.64) between age and ocular movement, and high correlation (rs = 0.79 to 0.86) among ocular amounts measured with imaginary vertical line Method, the lateral version light reflex test, and the limbus test of motility of Kestenbaum. CONCLUSIONS: This study suggests that any Method of three is reliable clinically.

Effect of Partial Ablation of Dense Diode Laser for Threshold Retinopathy of Prematurity

PURPOSE: To evaluate the effect of partial ablation using dense indirect laser photocoagulation with diode for the treatment of retinopathy of prematurity (ROP). METHODS: Twenty eyes of 10 premature babies with birth weight 1250 g or less and threshold ROP were treated. Diode laser photocoagulation were applied without scleral depression to the partial avascular retina in front of extravascular fibrovascular proliferation (EFP). The mean follow up period is 16.1 months. RESULTS: There was no retinal detachment, macular dragging, or other complication during follow up period. No premature babies have undergone reoperation due to the progression of disease. CONCLUSIONS: There is no difference between the effect of a dense pattern of diode laser to the partial avascular retina in front of EFP and the standard treatment to the whole avascular retina.

Spontaneous Separation of a Secondary Macular Epiretinal Membrane

PURPOSE: To report a young girl with spontaneous separation of an epiretinal membrane and notable visual recovery. METHOD: We experienced a 13-year-old girl with decreased visual acuity of left eye. We diagnosed secondary epiretinal membrane associated with chorioretinitis on macula. RESULT: She had spontaneous improvement in corrected visual acuity of left eye from 0.2 to 0.8 attributable to spontaneous separation of an epiretinal membrane more than 2 years after it was diagnosed. CONCLUSION: Conservative treatment can be considered in young patients with epiretinal membrane because spontaneous separation may occur and result in improvement of visual acuity.