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Biomedical subjects

E M Talbot

Publications and source records attributed to E M Talbot.

10 recordsLinked to original sources
PubMed1998

The benefit of second eye cataract surgery.

PURPOSE/METHOD: We prospectively assessed the binocular functions of 50 patients before and after second eye cataract surgery to determine whether limiting cataract surgery to the first eye was justified or not. RESULTS: After the first cataract operation 88% of operated eyes had a visual acuity of 6/12 or better but only 52% met the UK Driver and Vehicle Licensing Agency (DVLA) driving standard for visual acuity and field. Following second eye cataract surgery, visual acuity of the second eye was better than the first in 42% of patients. Moreover, 60% of patients had an improved binocular visual acuity after their second eye operation. Ocular dominance changed in 44% of cases. Stereo acuity improved from 32% after first eye surgery to 90% after second eye surgery. Binocular horizontal field of vision improved by 20 degrees or more in 54% of patients and binocular vertical field of vision improved in 36% after second eye surgery. The proportion of patients meeting the DVLA driving standard improved from 52% after first eye surgery to 86% after second eye surgery. CONCLUSIONS: Surgery on the second eye for cataract improves binocular function and enables a greater proportion of patients to meet the DVLA driving standard by expanding their horizontal field.

Aged↗
PubMed1992

The Purkinje vascular entoptic test: a halogen light gives better results.

The Purkinje vascular entoptic test is a test of macular function which employs a light directed through the sclera illuminating the fundus. This light casts shadows of retinal blood vessels on to posterior pole photoreceptors. When the light source is moved, a patient with a good macular function should be able to see a negative image of his or her retinal blood vessels. We evaluated the Purkinje test in eyes with clear ocular media. A bright 3.5 watt halogen rechargeable transilluminator was used instead of a pen torch as previously described. Sixty-eight patients (129 eyes) attending a diabetic eye clinic, were tested. The test correctly identified 91% of eyes with good macular function and 77% of eyes with poor macular function (visual acuity 6/24 or poorer). If a vascular pattern was seen, it was probable (0.89) that good macular function was present. If no vascular pattern was seen, it was probable (0.80) that the eye had poor macular function (chi 2 = 60.14, P = < 0.001). Our results were superior to those previously reported. We attribute the increased accuracy of our test to the brighter light source used.

Adult↗
PubMed1991

Controlled-tension suture-tying forceps.

Suture-tying forceps have been designed to enable surgeons to tie consecutive sutures to the same tension to create an evenly compressed wound. The tensioning effect of the forceps was tested by tying a suture to the end of a cantilever beam strain-gauge device. Three sutures were used: 10/0 nylon, 8/0 polyglactin (Vicryl) and 8/0 virgin silk. The tests were repeated, coating the tips with citrated blood, sodium hyaluronate and saline. Adjustment of the forceps altered the suture tension in 0.015-N steps. Sterilization of the forceps by ethylene oxide or by an autoclave caused no obvious regression in the forceps performance. When the suture and surface lubricant remain constant, there is a linear relationship between forceps setting and the tension induced in the suture.

Calibration↗
PubMedDate not supplied

Posterior chamber lens implantation combined with pars plana vitrectomy.

PURPOSE: To assess the outcome of cataract extraction and posterior chamber intraocular lens (IOL) implantation combined with pars plana vitrectomy. SETTING: Ophthalmic ward in a district general hospital. METHODS: This study evaluated seven consecutive patients who had cataract extraction, IOL implantation, and pars plana vitrectomy in one procedure. Four patients were diabetic, and three had perforating eye injuries with cataract formation and intraocular foreign bodies. RESULTS: No significant postoperative complications occurred, and the posterior chamber lenses were well tolerated. In all cases, good subjective visual improvement was achieved and visualization of the posterior pole was excellent. CONCLUSION: Combining cataract extraction with posterior chamber IOL implantation and vitrectomy in one procedure may be indicated, especially if there is traumatic rupture of the lens capsule.

Adult↗
PubMedDate not supplied

A case of developmental glaucoma presenting with abdominal colic and subnormal intraocular pressure.

A healthy baby boy presented with abdominal colic. He was subsequently noted to have enlarged, edematous corneas. A clinical diagnosis of developmental glaucoma was made despite ocular hypotony. Trabeculectomies were designed to include peripheral cornea. This served as a biopsy to confirm the diagnosis and as a surgical treatment for the condition. Morphological examination of the outflow system revealed findings compatible with a diagnosis of developmental glaucoma: a hypoplastic trabecular meshwork which contained an abundance of abnormal collagenous tissue in the extracellular spaces and the presence of endothelial cells overlying a continuous collagenous membrane. In the iris stroma there were numerous abnormal blood vessels, with a paucity of mural contractile cells.

Colic↗