Optical lens and visual acuity examination device
An optical lens and lens technology, applied in the field of optical lenses, can solve problems such as high cost and large space for vision inspection equipment, and achieve the effect of alleviating large space and high cost
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[0034] Aiming at the defects of the above prior art, the present invention provides an optical lens to virtualize a standard test distance of 5 meters, aiming to provide users with a space-saving, low-cost, and portable vision inspection lens, so as to detect vision changes in time , Early intervention, the purpose of preventing vision deterioration.
[0035] figure 1 It is a schematic diagram of an optical lens provided according to an embodiment of the present invention. In order to show the characteristics of the present embodiment, only the structure related to the present embodiment is shown, and the rest of the structures are omitted, wherein IMA is the entrance pupil of the human eye, or the assembly position of the image sensor, OBJ is the position of the eye chart or the visual mark E, and OA is optical axis.
[0036] Such as figure 1 As shown, the optical lens includes in sequence from the object side to the image side: a first lens 10 with negative diopter and a ...
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