Color vision defects in diabetic retinopathy

The association between color vision defects and diabetic retinopathy was reported by several authors. In order to study this relation 67 eyes of 40 diabetic patients were examined, also 40 eyes of 20 controls were studied. All the patients were examined ophthalmologically, fluorescein angiography was done and the colour vision was tested by Ishihara pseudoisochromatic plates and Farnworth Dichotomous test Panel D-15. 14.93% of eyes with diabetic retinopathy failed the Ishihara test, all of them showed maculopathy. 65.67% of eyes with diabetic retinopathy were color defective when tested with D-15 test. Blue-yellow defects constituted 70.45% of total color defects

Adjustable horizontal rectus muscle recession technique

Twenty patients with pure horizontal deviations were selected to evaluate the efficacy of surgical treatment by using the adjustment recession technique to attain ocular alingment with one operation and to minimize the need for staged operation or reoperation. The patients were operated upon using the two stage technique. The first stage is done under general anaesthesia while the second under local topical aneasthesia when the patient is awoke and cooperative four to six hours post-operatively. Ninty five percent of the cases attained the desirable goal with one procedure. Adjustment technique is specially needed whenever the surgical results are unpredictable. One can and should consider it in almost all adult strabismic cases

Laser photocoagulation in the treatment of aging macular degeneration

Sixty eyes of 35 patients having aging macula/ degeneration [AMD] 20 males and 15 females were evaluated as regards the effect of laser photocoagulation on the course of the disease. Laser photocoagulation was used in eyes with extrafoveal, juxtafoveal and peripapillary subretinal neovascularization [28 eyes]. Eyes with subfoveal choroidal neovascular membrane were followed up, and all of them developed a disciform scar in a period less than one year. Ophthalmological evaluation at the end of the follow up period [mean = 14.3 month post laser] showed that visual acuity in lasered eyes was stationary in 19 eyes [67.9%], improved in 4 eyes [14.3%] and worsened in 5 eyes [17.8%]

Changes in corneal thickness after intracapsular and planned extracapsular cataract extraction

Thirty patients of both sexes and of different age groups were admitted to Alexandria University Hospital, Ophthalmology Department, for cataract extraction. The patients were subdivided into two groups each of 15. The first group underwent intracapsular cataract extraction, while the second group underwent extracapsular cataract extraction. The corneal thickness was measured postoperatively by Carl Zeiss optical pachymeter. Both intracapsular and extracapsular groups showed a postoperative increase in corneal thickness, which was maximal on the first postoperative day. A gradual return to preoperative thickness occurs within two months

effect of external drainage operations on the scleral rigidity

Eighty eyes with chronic simple glaucoma were operated upon by trabeculectomy, Scheie's modified and iris inclusion operations. The scleral rigidity was measured, before operation and along a period of 30 months postoperatively. The mean coefficient of scleral rigidity was reduced from 0.0251 to 0.0231 in the eyes controlled with operation, from 0.0261 to 0.0240 in the eyes controlled with operation and miotics, and from 00255 to 0.0242 in the uncontrolled eyes with operation and miotics. The cause of reduction in the coefficient of scleral rigidity was the reduction in intra-ocular pressure and the addition of miotics in uncontrolled eyes with operation even with higher pressure

Krypton laser photoiridectomy in narrow-angle glaucoma

Krypton laser iridectomy was performed on 20 eyes of 14 patients. In eight eyes with closed angle glaucoma the intraocular pressure [IOP] was controlled within normal limits. Eleven eyes with narrow angles maintained a normal intraocular pressure after preventive laser iridectomy. Only in one eye with chronic closed-angle glaucoma the IOP was not controlled after laser iridectomy and the iridocorneal angle remained practically the same as before the procedure. The mean pressure was 28 mm.Hg. applanation before and 18 after the procedure. The iridectomies were performed with the use of Krypton laser power of 200 to 400 mw, exposure time of 0.1 to 0.2 S, and spot size of 50 to 200 u. Blue irides were slightly more resistant to treatment than brown irides. Krypton laser iridectomy by this technique is highly recommended as the procedure of choice for eyes with acute angle-closure glaucoma and for preventive iridectomy in the fellow eyes