| Summary: | 碩士 === 國立交通大學 === 電子物理系所 === 104 === Modern people often overuse their eyes, vision ability decline seriously. The age of children to have myopic eyes is also much lower than before. And that’s why eye care and ophthalmology medical become more and more important. One of the most common instrument in ophthalmology is autorefrator, but autorefrator still only have the main function of detecting the diopter of myopia, hyperopia and astigmatism. In ophthalmic medical, we hope instrument could both take care of accuracy and time efficiency. And the size of instrument is the smaller the better. Therefore, portable or multifunctional instrument is very important in the future.
To build a multifunctional autorefractor for human eye and spectacle, we use Hartmann-Shack wavefront sensor to get images and Zernike polynomials for analyzing. And design a fake eye model to simulate a wide range of myopia, hyperopia and astigmatism. We could also put the spectacle in front of the fake eye to measure the spectacle’s diopter.
We use commercial autorefractor as reference. And measure (1) Myopic eyes and hyperopic eyes. (2) Myopic eyes and hyperopic eyes with astigmatism. (3) Some common Spectacles.
In the range of referenced autorefractor: Sph-30 (D) ~ +25 (D), Cyl-12 (D) ~ +12 (D). Self-made autorefractor’s average error is 0.774 (D), compare with the referenced autorefractor’s average error 0.736 (D), only have the difference less than 0.01 (D), that’s very close. And in common range: Sph-10 (D) ~ +5 (D), Self-made autorefractor’s average error is 0.31 (D), compare with the referenced autorefractor’s average error 0.34 (D) is almost the same. And for the measure of spectacle, the myopic average error is 0.14 (D). Astigmatic average error is 0.23 (D), is also very accuracy.
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