Objective To observe the axial length and anterior chamber depth in eyes with branch retinal vein occlusion (BRVO). Methods Randomly selected 90 eyes of forty-five patients with BRVO were enrolled in this study. There were 25 males and 20 females. The mean age was (46.22±13.45) years. All the patients were underwent examination of visual acuity, slit-lamp microscope, indiophthalmoscope, fundus color photography and fundus fluorescence angiography (FFA). Randomly selected 45 healthy individuals for control group, including 28 males and 17 females. The mean age was (48.24±15.77) years. The axial lengths and anterior chamber depths of affected and fellow eyes of BRVO patients and the eyes of controls were measured using IOL Master. The data were compared by the two sample paired t test. Results The mean axial length of the affected eyes in the BRVO group was (22.69±0.99) mm, and that of the fellow eyes group was (22.78±1.24) mm. The difference in axial length between the affected eyes and fellow eyes in the BRVO group was not significant (t=0.355, P＞0.05). The mean axial length of the right eyes in the control group was (23.38±1.32) mm, and that of the left eyes in the control group was (23.37±1.27) mm. The difference in axial length between the left eyes and right eyes in the control group was not significant (t=0.017, P＞0.05), while the difference in axial length between the affected eyes in the BRVO group and the right, left eyes in the control group was significant (t=?2.563, ?2.663; P＜0.05). The mean anterior chamber depth of the affected eyes in the BRVO group was (2.66±0.26) mm, and that of the fellow eyes was (2.65±0.30) mm. The difference in anterior chamber depth between the affected eyes and fellow eyes in the BRVO group was not significant (t=0.089, P＞0.05). The mean anterior chamber depth of the right eyes in the control group was (2.56±0.29) mm, and that of the left eyes was (2.59±0.30) mm. The difference in anterior chamber depth between the left eyes and right eyes in the control group was not significant (t=?0.592, P＞0.05). The difference in anterior chamber depth between the affected eyes in the BRVO group and the right, left eyes in the control group was not significant (t=1.779, 1.778, P＞0.05). Conclusion In the affected eyes of BRVO, the axial length is shorter and anterior chamber depth is normal.
Tweenty-seven cases (27 eyes) of retinal detachment and change of anterior chamber angle induced by contusional eye injuried were reported ,in which there were 23 eyes with obviously visible recession of the chamber angle, and 10 eyes with adherent lesions in the chamber angle, The position of retinal holes and detachment of retina as well as changes of anterior chamber angle in majority of cases located at the sites of trauma or the quadr ants opposite to them. The proportions of retinal detachment due to dialysis of ora sen'am or round retinal holes were found to be high in this series of cases,and the round holes were found in injured eyes with relatively long courses of ocalar trauma. Owing to the close interrelationship between rbegmatogenous retinal detachment and the anterior chamber angle lesions after the eontusional ocular injuries,it was suggested that the chamber angle changes might be used as one of the important referential indicators in diagnosis of traumatic retinal detachment induced by blunt ocular injuries. （Chin J Ocul Fundus Dis,1993,9:74-76）
目的 通過比較白內障患者與正常人用兩種方法測量的前房深度和眼軸長度值，觀察IOL Master和接觸式A型超聲測量是否存在差別及其關聯程度。 方法 選取2010年12月－2011年2月期間行白內障摘除加人工晶狀體植入術的年齡相關性白內障患者及除屈光不正外沒有其他眼部病變的志愿者共89例。分別用IOL Maste和A型超聲測量54例（96只眼）白內障患者和35例（70只眼）正常者的前房深度（ACD）和眼軸長度（AL），應用配對t檢驗對每組兩種方法測得的ACD及AL值進行比較，并應用Pearson相關分析比較兩種方法的相關性。應用獨立樣本t檢驗比較白內障組和正常者組間兩種方法測得的差值是否不同。 結果 白內障組A型超聲和IOL Master測得的ACD值分別是（2.83 ± 0.34）、（3.05 ± 0.39） mm，AL值分別是（23.93 ± 2.46）、（24.27 ± 2.57） mm，差異均有統計學意義（P＜0.05）；正常者組A型超聲和IOL Master測得的ACD值分別是（3.16 ± 0.36）、（3.43 ± 0.46） mm，AL值分別是（24.16 ± 1.61）、（24.49 ± 1.62） mm，差異均有統計學意義（P＜0.05）。兩種測量方法的相關系數分別是rACD=0.823（P＜0.05）和rAL= 0.995（P＜0.05）。白內障組和正常者組兩種方法測得的ACD差值分別是（0.23 ± 0.23）、（0.28 ± 0.30） mm；AL差值分別是（0.34 ± 0.27）、（0.33 ± 0.15） mm；兩組間ACD和AL差值的比較，差異均無統計學意義（P=0.243，0.742）。 結論 不論是白內障組還是正常者組，用IOL Master測得的ACD及AL值均比A型超聲測得的相應值高，但是兩種方法測得的值高度相關。白內障組和正常者組用兩種方法測得的差值相比無差別；在可測到ACD及AL值的情況下，兩種測量方法的差值均不受晶狀體密度的影響。