| Citation:Spadea L,Maraone G,Verboschi F,Vingolo EM,Tognetto D.Effect of corneal light scatter on vision: a review of the literature.Int J Ophthalmol 2016;9(3):459-464,doi:10.18240/ijo.2016.03.24 |
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| Effect of corneal light scatter on vision: a review of the literature |
| Received:December 27, 2014 Revised:June 08, 2015 |
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| DOI：10.18240/ijo.2016.03.24 |
| Key Words:cornea haze light photorefractive keratectomy scattering vision |
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| Author | Institution |
| Leopoldo Spadea |
Department of Biotechnology and Medical-Surgical Sciences, “Sapienza” University of Rome, Latina 04100, Italy |
| Giorgia Maraone |
Department of Biotechnology and Medical-Surgical Sciences, “Sapienza” University of Rome, Latina 04100, Italy |
| Francesca Verboschi |
Department of Biotechnology and Medical-Surgical Sciences, “Sapienza” University of Rome, Latina 04100, Italy |
| Enzo Maria Vingolo |
Department of Biotechnology and Medical-Surgical Sciences, “Sapienza” University of Rome, Latina 04100, Italy |
| Daniele Tognetto |
Eye Clinic, Ospedale Maggiore, University of Trieste, Trieste 34010, Italy |
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| Abstract: |
| The cornea is the transparent connective tissue window at the front of the eye. The physiological role of the cornea is to conduct external light into the eye, focus it, together with the lens, onto the retina, and to provide rigidity to the entire eyeball. Therefore, good vision requires maintenance of the transparency and proper refractive shape of the cornea. The surface structures irregularities can be associated with wavefront aberrations and scattering errors. Light scattering in the human cornea causes a reduction of visual quality. In fact, the cornea must be transparent and maintain a smooth and stable curvature since it contributes to the major part of the focusing power of the eye. In most cases, a simple examination of visual acuity cannot demonstrate the reduction of visual quality secondary light scattering. In fact, clinical techniques for examining the human cornea in vivo have greatly expanded over the last few decades. The measurement of corneal back scattering qualifies the degree of corneal transparency. The measurement of corneal forward-scattering quantifies the amount of visual impairment that is produced by the alteration of transparency. The aim of this study was to review scattering in the human cornea and methods of measuring it. |
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