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Title: | Phakometry and lens tilt and decentration using a custom-developed Purkinje imaging apparatus: validation and measurements |
Authors: | Rosales, Patricia; Marcos, Susana CSIC ORCID | Keywords: | [OCIS] Vision, color, and visual optics: Vision system - noninvasive assessment [OCIS] Vision, color, and visual optics: Physiological optics Intraocular lenses (IOLs) Crystalline lens Phakometry Lens tilt Lens decentration |
Issue Date: | Mar-2006 | Publisher: | Optical Society of America | Citation: | J. Opt. Soc. Am. A 23(3): 509-520 (2006) | Abstract: | We present a Purkinje imaging system for phakometry and measurement of tilt and decentration of crystalline and intraocular lenses (IOLs). Crystalline lens radii of curvature were estimated by using both a merit function and the equivalent mirror approaches. Tilts and decentrations were estimated by using Phillips’s linear analysis. We present a complete validation of the technique through exhaustive computer simulations and control experiments, and measurements in 17 normal eyes (mean age 26.67 ± 2.31) and nine postcataract surgery eyes (mean age 74 ± 2.3). Crystalline lens radii ranged from 12.7 to 8.81 mm and from −5.64 to −7.09 mm for anterior and posterior surfaces, respectively. Crystalline lens tilt ranged from 2.8 to −2.87 deg horizontally and from 2.58 to −1 deg vertically. Crystalline lens decentration ranged from 0.09 to 0.45 mm horizontally and from 0.09 to −0.22 mm vertically. IOL tilt ranged from 3.6 to −1.51 deg horizontally and from 5.97 to −1.85 deg vertically. IOL decentration ranged from 0.53 to −0.31 mm horizontally and from 0.13 to −0.96 mm vertically. | Description: | 12 pages, 8 figures.-- OCIS codes: 330.5370, 330.4300. | Publisher version (URL): | http://dx.doi.org/10.1364/JOSAA.23.000509 | URI: | http://hdl.handle.net/10261/8579 | DOI: | 10.1364/JOSAA.23.000509 | ISSN: | 1084-7529 |
Appears in Collections: | (CFMAC-IO) Artículos |
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