Effects of open heart surgery on intra ocular pressure [IOP]

The intra ocular pressure in both eyes of 23 patients undergoing open heart surgery, was measured by Schiotz indentation tonometer before, during and after the surgery until it returned to the pre operative levels. It was observed that a marked and rapid drop of the IOP occurs during the operation time, reaching its minimum during the cardio-pulmonary by-pass [[PB] period, then it gradually rises to its normal pre operative levels in 69.5% of cases [16 out of 23] at the end of the first post operative day, in 91% of cases [21 out of 23] at the end of the second post operative day and in all cases [100% of cases] at the end of the third post operative day. The possible explanations for such changes were discussed in view of the anaesthetic agents, techniques and associated hemodynamic parameters

Ophthalmic evaluation in tuberous sclerosis

Ocular examination, fundus photography, electroretinogram and visual evoked potential were done for 10 patients with tuberous sclerosis. Fluorescein angiography was performed for two of them. The presence of retinal hamartomas of different types implicates that ophthalmic evaluation should be an integral part in the assessment of tuberous sclerosis

Anterior segment compications following scleral encirclement procedures

Scleral buckling procedure can be responsible for some corneal damage and anterior segment ischemia if some or all of the following factors are present: High risk cardiovascular patients, sickle cell disease, dry eye and diabetic patients were subjected to surgery for retinal detachment. Rough handling and unncessary extraocular muscle tenotomy. Excessive diathermy over long posterior ciliary arteries and nerves, injury to vortex veins. Too high, too tight and too narrow buckle

Tarsal reconstruction

A new operation for vertically short upper lid is dissuced. Twenty one upper lids from 16 patients were operated upon, five were bilateral and 11 unilateral. All lids showed marked vertical shortening, 17 had acccompanying ectropion trichiasis which becomes worst on looking upward, 5 had moreover notching of lid margin. All cases had been subjected previously to surgical interferences, before presentation with heir conditions. The cause of this lid disorder is fully discussed. Its repair was achieved by tarsal reconstruction using cartilage grafts, fresh and stored. The technique of surgical proceedure is explained and results are discussed

Effect of partial trasectomy on the stability of the precorneal tear film

The Precorneal tear film is formed of three components. We chose to study the most superficial oily layer which is secreted by the meibomian glands. Ten cases of trichiasis entropion were selected from the out-patient ophthalmic clinic of Ain Shams University Hospital during the year 1984. We did for every case before and after Snellen's operation [partial tarsectomy] Schirmer's tear that test No. 1 and tear film break up time [B.UT.]. The results were diminution of Schirmer's test No. 1 and Shortening of tear film break up time after Senllen's operation by two weeks. This indicates that the oily layer is important for stabilization of the precorneal tear film