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Biomedical subjects

L Whitefield

Publications and source records attributed to L Whitefield.

7 recordsLinked to original sources
PubMed2003

A pilot study of pars plana vitrectomy, intraocular gas, and radial neurotomy in ischaemic central retinal vein occlusion.

BACKGROUND/AIMS: There is no effective treatment for ischaemic central retinal vein occlusion (CRVO). The two major negative outcomes are neovascular glaucoma (NVG) and severe central visual loss. In this study pars plana vitrectomy (PPV), mild panretinal photocoagulation, and intraocular gas injection were employed to prevent NVG. The potential role of incision of the lamina cribrosa (radial neurotomy) for visual recovery was examined. METHODS: Eight eyes of seven patients with ischaemic CRVO had PPV, mild panretinal photocoagulation, and intraocular perfluoropropane gas injection. Four eyes had radial neurotomies performed. The patients were examined by fundus photography, fundus fluorescein angiography, optical coherence tomography, and Goldmann visual field analysis. RESULTS: No patients suffered from neovascular glaucoma. Visual recovery was seen in patients with and without neurotomy but some patients had cataract extraction to allow visualisation for PPV. Fundus photography demonstrated reduced engorgement of retinal veins in two of the patients with neurotomy and one with PPV alone. Optical coherence tomography demonstrated macular oedema in three patients with neurotomy and all patients with PPV alone. Segmental visual field loss was seen in one patient with neurotomy suggesting damage to the optic nerve head. CONCLUSIONS: PPV is safe in ischaemic CRVO. Combined with mild PRP and intraocular gas injection the risk of neovascular glaucoma is low. Neurotomy can be added to try to improve the chances of recovery of central vision but may cause additional peripheral visual field loss.

Aged↗
PubMed1996

Contact lens care in the unconscious.

We present a case of gradual visual loss in a patient after a severe road traffic accident. The cause of visual loss was prolonged contact lens wear. We stress the importance of excluding contact lens wear and suggest a method for bedside examination of an unconscious patient to detect the presence of contact lenses.

Adult↗
PubMed1996

First day follow up for routine phacoemulsification?

AIMS: To determine the postoperative morbidity on day 1 after uncomplicated phacoemulsification. METHODS: A prospective study was performed on 100 otherwise healthy eyes after uncomplicated phacoemulsification and lens implant. Patients were examined on the first postoperative day and any deviation from a set postoperative protocol was recorded. RESULTS: Transient intraocular pressure rises of 30 mm Hg or greater were seen in three eyes. These all settled after a single dose of oral acetazolamide 250 mg. CONCLUSIONS: The results of this study reinforce the clinical impression that the need for day 1 routine follow up in this selected group of patients is questionable and probably unnecessary.

Acetazolamide↗