Draw A Large Cross With A Thin Pen On A White Paper To Test The...

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2024-09-06 09:02:55 -

Draw A Large Cross With A Thin Pen On A White Paper To Test The Eyeglasses Optical Center

Test the optical center displacement of the cheap eyeglasses near me by drawing a large cross with a thin pen on white paper, with clear and straight strokes. Place the handheld lens between the eye and the cross, and observe the shape of the cross stroke through the mirror with one eye. If the strokes inside and outside the mirror are not on the same line. Move the lens so...

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