Corneal thickness and elevation maps computed from optical rotary scans

Autor: Franco, S., Almeida, J. B., Parafita, M.

Publikováno v: J. Refract. Surg., 20, pp. S576-S580, (2004)

Purpose: Recently the authors presented a technique that allows corneal thickness measurements along any meridian from optical sections obtained using a rotary scanning system. This paper presents 3-D mapping of the corneal thickness and topography o

Externí odkaz: http://arxiv.org/abs/physics/0405020

Wigner distribution transformations in high-order systems

Autor: Almeida, J. B., Lakshminarayanan, V.

Publikováno v: J. Comput. Appl. Math., 160 (1-2): 17-26 Nov 1 2003

By combining the definition of the Wigner distribution function (WDF) and the matrix method of optical system modeling, we can evaluate the transformation of the former in centered systems with great complexity. The effect of stops and lens diameter

Externí odkaz: http://arxiv.org/abs/physics/0305020

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Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction?

Autor: Jorge Jorge, Queirós, A., Almeida, J. B., Parafita, M. A.

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Ciência Vitae
Scopus-Elsevier
CIÊNCIAVITAE

Purpose: The aim of this study was to estimate the agreement between an autorefractor (Nidek ARK 700A) and retinoscopy with subjective refraction. Methods: Measurements of autorefraction obtained with the ARK700A and retinoscopy were performed on 192

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::1b8401ca91b5c86e1407142e932d4c6c