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A Yoshida, S Ishiko, N Kitaya, J Takahashi, FJ Van de Velde, CL Schepens; Retinal Sensitivity at the Margin of Macular Holes . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2480.
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Purpose: To study the retinal sensitivity at the nasal margin and at the temporal margin of macular holes. Methods: Fourteen eyes of 14 patients with macular hole ( 4 stage 2, 5 stage 3, and 5 stage 4) and 5 healthy control were included in this study. The retinal sensitivity at the nasal and at the temporal margin of the macular hole, and at the nasal side and at the temporal side of the fovea in control eyes were measured using our program based on a PEST strategy with a scanning laser ophthalmoscope. Stimulus size was 10 minarc square. Photopic illuminance (more than 500 td) and low illuminance (less than 5 td) were used for background conditions in each measurement. Retinal sensitivity is expressed as dB attenuation on a logarithmic scale down from a maximum light level in each background condition. Results: No differences in retinal sensitivity between the nasal side and the temporal side of the fovea in control eyes were observed under both background conditions. Under a photopic background illuminance, no differences in retinal sensitivity were observed between the nasal margin and the temporal margin of the macular hole. However, only in stage 3 macular hole, the retinal sensitivity at the temporal margin of the hole (8.4 4.7 dB) was significantly lower than at the nasal margin (10.2 5.3 dB) under a low background illuminance (p<0.05). Conclusion: Differences in retinal sensitivity between the nasal margin and the temporal margin of the hole in stage 3 macular hole might be related to a difference in vitreous traction at each margin of the hole.
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