Background Optical coherence tomography (OCT) acquires cross-sectional retinal images with high resolution using low-coherence interferometry. Few studies have studied the effect of demographic data and ocular parameters that may affect central retinal thickness. In this study, these factors were used as parameters to analyse if any significant relationship exists with central retinal thickness. Methods Volunteers with a best-corrected visual acuity of 6/12 or better and no evidence of ocular abnormalities or interventions were recruited from October 2001 to March 2003. Body mass index (BMI), autorefraction, and keratometry recordings were measured, followed by applanation tonometry and Ascan ultrasonography. The central retinal thickness of the right eye was analysed using a scan length of 3 cm. Another 25 eyes were selected for interobserver reproducibility. Results In all, 117 normal subjects (60 male and 57 female subjects) were recruited. The mean thickness of the central retina with a diameter of 1 mm was 203723 mm for male and 189720 mm for female subjects. Age, intraocular pressure, and keratometric readings were not significantly correlated with central retinal thickness. Using multiple regression, gender, BMI, axial length, and signal-to-noise ratio (Po0.05) were significantly associated with the central retinal thickness. The intraclass correlation coefficient was 0.98 for interobserver reproducibility. Conclusion OCT has a high interobserver reproducibility. The male gender, larger BMI,

When a correction factor of 32 microm was applied to OCT measurements, the means of three devices became significantly equal. The adjusted OCT measurements were less precise within subjects but more accurate than Orbscan when compared with ultrasound pachymetry as a reference standard. The mean CCT measurement of our sample was comparable to some studies on Hong Kong Chinese, Caucasians and Japanese but higher than those on some Europeans, Asian and North Americans of African origin.

A 44-year-old man suffered traumatic 360-degree cyclodialysis in the left eye complicated by persistent hypotony, disc edema, maculopathy, and cataract. Treatment was removal of the cataract with phacoemulsification followed by insertion of a capsular tension ring with 2-point scleral suture fixation with polypropylene in the ciliary sulcus. A foldable acrylic posterior chamber intraocular lens was implanted in the capsular bag through the 4.1 mm corneal tunnel incision. The intraocular pressure responded well with resolution of hypotony, choroidal detachment, disc edema, and maculopathy. Ultrasound biomicroscopy showed complete closure of the cyclodialysis cleft.

Combined NPDS and phacoemulsification could be a safe and effective surgical option for the management of CACG with cataract.