Congenital Stationary Night Blindness with Myopia

PURPOSE: To report a case of Congenital stationary night blindness associated with myopia. METHODS: A 19-year-old male with night blindness was referred to our hospital. We studied patient's family history, refraction, color vision test, fundus examination, electroretinogram and visual field. RESULTS: Both fundi showed temporal conus and myopic change. Both visual field revealed generalized depression. The light- and dark-adapted electroretinogram showed a normal a wave with extremely reduced b wave, resulting in a typical "negative" wave form.

Clinical Analysis of Rhegmatougenous Retinal Detachment after Laser Refractive Surgery

PURPOSE: To evaluate the clinical presentation, surgical outcome of rhegmatogenous retinal detachment(RRD) after laser refractive surgery and the relationship between RRD and laser refractive surgery. METHODS: We examined age distribution, refractive error, time interval of RRD onset after refractive surgery, shape and location of retinal break, extent of RD, refractive change and postoperative complications in fifteen patients who experienced RRD after LASIK(9 eyes), or PRK(6 eyes) from March 1993 to August 2001. RESULTS: 66% of patents were in twenties, 47% of patients developed RD within 1 year after refractive surgery, 80% of patients had horse shoe type retinal tear and refractive changes after RD surgery were within 2 diopters. Patients who had undergone LASIK had shorter time interval in developing RRD, more refractive change, and more complications than those with PRK. CONCLUSIONS: These results suggest that laser refractive surgery can be one of the cause of RD. LASIK had more association with RD than PRK. Thorough retinal exam will be needed in patients undergoing LASIK.

Angle Kappa Measurement with Slit Lamp Biomicroscope

PURPOSE: There has been a difficulty in measuring angle kappa because special instrument was required. To measure the angle kappa conveniently, we designed a new method using slit lamp biomicroscope. METHODS: We measured the angle kappa in 124 eyes of 62 patients with newly designed method and compared the measurement by new method with those by T-shape ruler or the major amblyoscope. RESULTS: We found the average angle kappa was +3.12 degrees by slit lamp, +2.85 degrees by major amblyoscope and +3.04 degrees by T shape ruler method. There was no significant difference between slit lamp and either major amblyoscope method (p=0.48) or T shape ruler (p=0.18). CONCLUSIONS: The new method of measuring angle kappa using slit lamp biomicroscope seemed to be a convenient and relatively accurate method for measuring of angle kappa and appeared to be beneficial in measurement of ocular deviation.