Aim a projective digital lensometer is presented.

目的描述一种投影式数字焦度计。

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Methods The designed lensometer primarily consists of light system, collimating system and projective system.

方法设计的焦度计主要由照明系统、准直系统、投影光学系统组成。

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Objective:To confirm that the lensometer adjusted by the special lenses group for contact lenses can't express the back vertex power of contact lenses.

目的：证实采用接触镜专用标准透镜组标定的焦度计不能准确测定被测角膜接触镜的顶焦度。

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Objective:To confirm that the lensometer adjusted by the special lenses group for contact lenses can't express the back vertex power of contact lenses.

目的：证实采用接触镜专用标准透镜组标定的焦度计不能准确测定被测角膜接触镜的顶焦度。

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