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J Opt Soc Am A Opt Image Sci Vis ; 36(9): 1584, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31503854


This publisher's note corrects the funding section in J. Opt. Soc. Am. A36, 1015 (2019)JOAOD61084-752910.1364/JOSAA.36.001015.

J Opt Soc Am A Opt Image Sci Vis ; 36(6): 1015-1021, 2019 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-31158132


We evaluated the dynamics of ocular surface temperature using thermal imaging in 21 glaucoma subjects and 19 healthy subjects. On opening of the eye, subjects with glaucoma showed significantly cooler temperatures in the central cornea compared to the control group. The upper eyelid was also significantly cooler just before the eye opened. Immediately after opening the eye, the dynamic of temperature change was different in the two groups. In subjects with glaucoma, the eyes cooled significantly faster, with an average decrease of 0.49°C during the first second compared to 0.24°C in the control group. Our results support the hypothesis that both the stability of the tear film and changes in the ocular blood supply in subjects with glaucoma play an important role in thermal dynamics of the ocular surface.

Temperatura Corporal/fisiología , Córnea/fisiología , Glaucoma/fisiopatología , Termografía/métodos , Adulto , Ojo/irrigación sanguínea , Femenino , Humanos , Rayos Infrarrojos , Masculino , Estudios Prospectivos
Appl Opt ; 56(7): 1898-1907, 2017 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-28248387


Instead of measuring the wavefront deformations, Hartmann and Shack-Hartmann tests, we measure the wavefront slopes, which are equivalent to the ray transverse aberrations. Numerous different integration methods have been described in the literature to obtain the wavefront deformations from these measurements. Basically, they can be classified in two different categories, i.e., modal and zonal. In this paper, we describe a proposed new zonal procedure. This method finds a different analytical expression for each square cell formed by four sampling points in the pupil of the system. In this manner, a full single analytical expression for the wavefront is not obtained. The advantage is that small localized errors that cannot be adjusted by a single polynomial function can be represented with this method. A second advantage is that the analytical function for each cell is obtained in an exact manner, without the errors in a trapezoidal integration.