Ciliary muscle micro fluctuation and LED glare research

• Main Authors: Chi-Yuan Hsia, 夏繼源
• Other Authors: Rong-seng Chang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/98506876654672130352

碩士 === 國立中央大學 === 光電科學研究所 === 99 === White light LED can save two third of every power consumption compare with our daily used reference light, It is an important green energy. Glare is an important light-distress indicator of our environment. It is generally a subjective discomfort sensation while a person is exposing to a light source. Glare may possibly induce many eye problems. However, it is seldom expressed in the objective scale. The short wave of their glare effect to measure it is the CIE glare index equation. But the CIE glare index is coming from subjective questionnaire and statistical result. The purpose of this paper is to develop an objective investigation of glare. At this experiment use the new design instrument to measure the Ciliary body micro fluctuation then decision the glare degree. This instrument is an ultrafast automatic refractometer capable of near vision measurement, was used to measure accommodation. High frequency component (HFC) was extracted through Fourier transformation. The methods used LED white-light bulb with 13-watt that was put in upper-anterior-lateral θ degree position then illuminate to the eye (θcould be from 90° to 0°, here we chose θ=43° and 0°). Without LED light, accommodation was measured with our equipment, and HFC was extracted simultaneously. Then LED bulb of θ=43° with eye was turned on to trigger glare, and accommodation measurement was done in the same manner. Afterwards, the cycloplegic eye drop was applied and high myopia/anisometropia unilateral cataract volunteers then test was repeated again. Statistical difference exists between light-on and light-off condition in the form of accommodation and HFC. In the cycloplegic group, the HFC change is more prominent. Then we use θ=0° position and turn on the power variable LED vision target, we get the same result which showing that the strength of the glare is proportional to the HFC. For the first time, an objective method to measure the glare using the parameters such as accommodation and HFC is established. The approach is sensitive and reproducible.