②自觉斜角(subjective angle)不等于他觉斜角(objective angle)，两者相差5°以上者为异常视网膜对应，两斜角之差为异常角(angle of anomaly)，异常视网膜对应又分为以下3种。
基于20个网页-相关网页
objective angle of image field 像场角
From an objective angle 从一个客观的角度
the pure objective angle 纯客观视角
pure objective angle of view 纯客观视角
wide angle objective 广角镜头
wide-angle objective 广角物镜 ; 广角镜头
symmetrical wide-angle objective 对称广角物镜
wide-angle mapping objective 广角摄影物镜
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