Dacosta Shaun, Fernandes Gitanjali, Rajendran Babu, Janakiraman P
The Eye Research Foundation, Vijaya Hospital, Chennai, India.
Indian J Ophthalmol. 2008 Jan-Feb;56(1):17-22. doi: 10.4103/0301-4738.37591.
To compare the anterior segment parameters in photopic and scotopic conditions using anterior segment optical coherence tomography (AS OCT) in Indian eyes.
One hundred eyes of 100 normal subjects of both sexes, aged 19 to 76 years, underwent anterior segment evaluation by AS OCT (Visante OCT). Central corneal thickness (CCT), central anterior chamber depth (ACD), pupil diameter (PD) and the temporal and nasal peripheral irido-corneal angles were assessed in photopic and scotopic conditions. These anterior segment parameters were stratified for age, sex and refractive error.
Mean values of the parameters measured in photopic and scotopic conditions respectively were as follows: ACD (mm) 2.88 +/- 0.32, 2.89 +/- 0.32 (P = 0.10); nasal angle (degrees) 28.80 +/- 5.91, 22.28 +/- 7.50 (P < 0.001); temporal angle (degrees) 29.95 +/- 6.74, 22.82 +/- 8.43 (P < 0.001); pupil diameter (mm) 4.08 +/- 0.91, 4.68 +/- 0.92 (P < 0.001); CCT (microm) 519 +/- 33.88, 519 +/- 33.88.
There was no significant difference in the ACD in photopic and scotopic conditions. While the nasal and temporal angles showed a significant decrease, the pupil diameter showed a significant increase in scotopic conditions. Mean central ACD decreased with age and was shallower in females than in males. It was highest in myopes and lowest in hypermetropes. CCT was not influenced by photopic and scotopic conditions.
使用眼前节光学相干断层扫描（AS OCT）比较印度人眼睛在明视和暗视条件下的眼前节参数。
100名年龄在19至76岁之间的正常受试者（男女各50名）的100只眼睛接受了AS OCT（Visante OCT）眼前节评估。在明视和暗视条件下评估中央角膜厚度（CCT）、中央前房深度（ACD）、瞳孔直径（PD）以及颞侧和鼻侧周边虹膜角膜角。这些眼前节参数按年龄、性别和屈光不正进行分层。
在明视和暗视条件下测量的参数平均值分别如下：ACD（mm）2.88±0.32，2.89±0.32（P = 0.10）；鼻侧角（度）28.80±5.91，22.28±7.50（P < 0.001）；颞侧角（度）29.95±6.74，22.82±8.43（P < 0.001）；瞳孔直径（mm）4.08±0.91，4.68±0.92（P < 0.001）；CCT（μm）519±33.88，519±33.88。
明视和暗视条件下ACD无显著差异。鼻侧和颞侧角在暗视条件下显著减小，而瞳孔直径在暗视条件下显著增大。平均中央ACD随年龄减小，女性比男性更浅。在近视眼中最高，在远视眼中最低。CCT不受明视和暗视条件影响。
