Ultraviolet analysis of donated corneas: a portable prototype
| Autor: | Victor A. C. Lincoln, Liliane Ventura, Sidney Júlio de Faria e Sousa |
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| Rok vydání: | 2010 |
| Předmět: |
CÓRNEA (ANÁLISE)
Materials science Tissue and Organ Procurement Ultraviolet Rays Materials Science (miscellaneous) medicine.medical_treatment Aqueous humor medicine.disease_cause Eye Banks Photorefractive Keratectomy Industrial and Manufacturing Engineering Dual beam Cornea Optics medicine Cadaver Humans Business and International Management Uv protection business.industry Eye bank eye diseases Photorefractive keratectomy Tissue Donors medicine.anatomical_structure Spectrophotometry Ultraviolet sense organs business Ultraviolet |
| Zdroj: | ResearcherID Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1539-4522 |
| Popis: | As technology improves human vision, some procedures currently performed may be causing a decrease of the natural UV protection of the cornea. A portable dual beam system prototype was assembled for physicians for clinical studies of these effects on the corneas endowing two types of 300-400 nm evaluations: 1, regularly donated corneas and 2, simulating refractive keratectomy by corneal lamellae removal. The system performs 500 measurements/s, providing ±0.25% precision for the transmittance. The measurements performed on the prototype are 95% in agreement with Cary 17 and HR4000CG-UV-NIR Ocean Optics spectrophotometers. Preliminary studies on cadaveric corneas demonstrate that, as the stromal layer is reduced (∼150 μm depth), there is significant loss--an average of 7.1%.--of the cornea's natural UV protection. The prototype is being tested in an eye bank for routine evaluation of donor corneas. |
| Databáze: | OpenAIRE |
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