The curvature measurement of the human eyeball

✍ Scribed by Yun Long Lay; Rong Seng Chang; Pei-Wen Chen; Ming-Chang Tu

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 566 KB
• Volume: 29
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(97)00008-x

✦ Synopsis

The curvature of the cornea in the ophthalmology field is essential data, especially for humans when they are being tested for wearing contact lenses, or for patients undergoing refractive surgery by either knife or laser. It is extremely difficult to measure the curvature of the eye precisely because the measurement of the cornea, using a contact tool, is not possible. In this paper, we propose a method to measure the curvature using lens aberration theory and an image processing technique. We project a circular grating, known as a Placid0 disc, on to the cornea, The reflective image does not have equal divisions and this distortion value contains the curvature information.