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Biomedical subjects

F M Chapman

Publications and source records attributed to F M Chapman.

8 recordsLinked to original sources
PubMed1999

Association among visual hallucinations, visual acuity, and specific eye pathologies in Alzheimer's disease: treatment implications.

OBJECTIVE: Studies suggest a link between visual acuity and visual hallucinations in dementia, but links with specific eye pathologies have not been evaluated. METHOD: Fifty patients (20 with visual hallucinations, 30 without) with probable Alzheimer's disease had an evaluation of psychotic symptoms. Visual acuity was measured before and after refractions, and ophthalmological examinations included standardized assessments for cataracts and macular degeneration. RESULTS: Impaired visual acuity and the severity of cognitive impairments were significantly associated with visual hallucinations. No patients with normal acuity (6/5 or 6/6 on the Snellen chart) experienced these symptoms. Impaired acuity improved with refraction in 60% (N = 12) of the patients with visual hallucinations. Of specific eye pathologies, only cataracts were significantly associated with visual hallucinations. Descriptive follow-up information suggests that an optician's assessment for glasses improves outcome. CONCLUSIONS: Glasses and cataract surgery need evaluation as prophylactic or adjunctive treatments for visual hallucinations in patients with probable Alzheimer's disease.

Aged↗
PubMed1997

Catching glaucoma.

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Diagnostic Errors↗
PubMed1996

Cost effectiveness of a single-function treatment center for cataract surgery.

PURPOSE: To compare the clinical and cost effectiveness of two models for cataract treatment: a single-function Cataract Treatment Centre (CTC) and a general ophthalmology service. SETTING: Cataract Treatment Centre and the general ophthalmology service at Sunderland Eye Infirmary, Sunderland, United Kingdom. METHODS: Two hundred patients were studied using two models of care: 100 in the CTC and 100 in the general ophthalmology service. Outcome measures were best corrected visual at 3 months postoperatively or at discharge and occurrence of surgery-related complications. All direct costs to the National Health Service were identified, measure, and assessed. RESULTS: Clinical outcomes in the two groups were similar. The average cost per patient was 496.90 pounds ($760.25) at the CTC and 566.34 pounds ($866.50) at the general ophthalmology service. The cost per patient treated as a day case in the general service group was 495.84 pounds ($758.63). Thus, treatment at the CTC was more cost effective than in the mixed service group and as cost effective as in the day case subgroup. CONCLUSIONS: Depending on local circumstances, day care must be delivered more cost effectively in a single-function center than in a general ophthalmology service. We recommend day care using local anesthesia and protocols for assessment, surgery, and follow-up.

Anesthesia↗
PubMed1996

Secondary implantation of open-loop, flexible, anterior chamber intraocular lenses.

PURPOSE: To assess the results of implantation of secondary, open-loop, flexible, anterior chamber intraocular lenses (IOLs) and compare the findings with those of other published studies. SETTING: A combined ophthalmology and ear, nose, and throat hospital in Middlesbrough, Cleveland, England. METHODS: This retrospective study comprised 81 patients who had secondary implantation of a flexible, open-loop, anterior chamber IOL by the one surgeon. The incidence of postoperative complications was ascertained, and best corrected preoperative and postoperative visual acuities were compared. RESULTS: Two serious complications occurred: one severe loss of vision that is still under investigation and one retinal detachment that was repaired with good residual visual function. Of all 81 patients, 92.5% were within one Snellen line of their preoperative best corrected visual acuity. These results compare favorably with those of other published studies. CONCLUSION: Using an open-loop, flexible, anterior chamber lens for secondary implantation is still an acceptable way to treat aphakia. The poor reputation of these lenses is undeserved.

Adult↗