以微電腦繪製Random-Dot立體感測試圖,可以改變圖形大小,Random Dot點密度等測試參數,並考慮測試病人時使用上的方便,繪出自己想要的圖形,供研究及臨床使用。本篇採用Apple-Ⅱ相合電腦,Koala micro llustrator及Alpha Plot軟體,以Epson FX-80列表機繪出立體感測試圖,用AO公司之立體感訓練器讀圖。
Random-dot stereogam is the tool with least monocular cue to test human stereopsis. Commercially available random-clot stereogram includes TNO, Randot etc. Some parameters such as the size of the figure, the density of the random dots, the total visual angles extended and the complexity of the figure can't be changed with such stereogram. With Apple-Ⅱ compatible microcomputer, Epson FX-80 dot matrix printer and softwares including Koala Microillustrater and Alpha Plot, we developed a regular procedure to produce random dot stereogram as we will. The present stereogram is viewed with binocular vision training set of AO company. And the main obstacle presented is the finest disparity we can make with the above facilities shows only 356 sec-arc. We hope to develop stereogram of 10 sec-arc or less with better computer, better printer or even with any other techniques such as Xerox and photography etc.