System based on the contrast of Purkinje images to measure corneal and lens scattering

• Published in: Biomedical optics express Vol. 9; no. 10; pp. 4907 - 4918
• Main Authors: Santos, Pau, Martínez-Roda, Juan A, Ondategui, Juan C, Díaz-Doutón, Fernando, Cazal, Jorge A Ortiz, Vilaseca, Meritxell
• Format: Journal Article Publication
• Language: English
• Published: United States Optical Society of America 01.10.2018
• Subjects: Ciències de la salut; Ciències de la visió; Cornea; Còrnia; Dispersió; Ghost reflections; Instruments òptics i optomètrics; Intraocular lenses; Lents intraoculars; Lents oftàlmiques; Light; Llum; Medicina; Oftalmologia; Ophthalmic optics and devices; Ophthalmology; Physiological optics; Scattering; Scattering measurements; Stray light; Àrees temàtiques de la UPC; Òptica fisiològica; Òptica física; (330.4460) Ophthalmic optics and devices; (290.2648) Stray light; (330.5370) Physiological optics; (170.4470) Ophthalmology; (290.2745) Ghost reflections; (290.5820) Scattering measurements
• ISSN: 2156-7085; 2156-7085
• DOI: 10.1364/boe.9.004907

Current methods to measure intraocular scattering provide information on the total scattered light, which consists of the combined contributions originating from different ocular structures. In this work, we propose a technique for the objective and independent assessment of scattering caused by the cornea and the lens based on the analysis of the contrast of the third and fourth Purkinje images. The technique is preliminarily validated first by using artificial eyes with different levels of corneal and lens scattering; second, it is validated in eyes wearing customized contact lenses to simulate corneal scattering and eyes with nuclear cataracts. Finally, it is tested on a larger population of eyes with cataracts and corneal disorders to prove its clinical usefulness.