Unverified70% confidenceFactTime unknown

犬眼球直径约20-22mm、猫约22mm，均小于人眼(24mm)且角膜曲率不同，间接检眼镜透镜屈光度选择与人用一致(20D/28D)可通用，但工作距离和照明角度需按小眼球微调

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眼科检查仪category

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Unverified直接检眼镜(直接眼底镜)对犬猫眼底视野窄、放大约15倍但范围小，全景检查建议选双目间接检眼镜配20D/28D透镜，28D视野更大适合初筛、20D放大更适合看视盘细节88% similar Unverified硬性内镜按视角分0°、30°、70°，宠物膀胱镜和关节镜常用30°斜视镜以扩大观察范围，鼻腔和耳道检查多用直径2.7mm或1.9mm的0°或30°镜75% similar

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