This case create " geometric optics type Vission detector ", characteristic mainly what using lens can to light generate refraction effect characteristic, make human eye to short distance as give a test of one's eyesight with sighting target, can produce the visual effect person of the long range.Therefore, the sighting target detector developed using above-mentioned characteristic can save detection space, while the spatial impression of long range can be still felt for measured.本案創作「幾何光學型視力檢測裝置」，其特徵主要在於利用透鏡可對光線產生折射現象之特性，使人眼對在近距離做為檢測視力用之視標，可產生長距離之視覺效果者。因此，利用上述之特徵所發展出之視標檢測器可節省檢測空間，同時對被測者而言仍可感覺出長距離之空間感。
