Hand-operated integrated refractometer

Abstract

A hand-operated integrated refractometer comprises a cross rack for regulating pupil distance, a top frame and fine-turning members. The cross rack for regulating pupil distance comprises a cross rack casing, independent pupil distance regulators are symmetrically arranged on the cross rack casing bilaterally. Each pupil distance regulator comprises a guide rail block horizontally arranged on thecross rack casing, sliders slidably connected with the guide rail blocks is arranged below the guide rail blocks, and a crankshafts are connected to the sliders and provided with lead-screw sliders. A lead-screw support block is fixed on the cross rack casing and supports lead-screws arranged horizontally, the lead-screw sliders are connected to the lead screws in a threaded manner, and pupil distance hand wheels are connected to the outer ends of the lead-screws. Scale sign plates are fixed on the sliders, and scale indicating plates fixed on the cross rack casing are arranged below the scale sign plates. By the pupil distance regulators arranged independently bilaterally, the pupil distance can be regulated more flexibly and conveniently under single action, the measurement results are more accurate, and actual requirements of people subjected to vision measurement can be met better.

Description

technical field [0001] The invention relates to an optometry instrument, in particular to a manual comprehensive optometry instrument. Background technique [0002] The manual comprehensive optometry instrument in the prior art includes a top frame for suspending the examination disc; a fixed hand wheel for adjusting and fixing the position of the examination disc; a horizontal mark showing the horizontal tilt state of the examination disc; The horizontal handwheel for the horizontal position of the tested binoculars; the interpupillary distance handwheel for adjusting the relative position between the eye hole and the pupils of the tested binoculars; used for switching different auxiliary inspection lenses; the auxiliary film handwheel for completing various visual function inspections; The interpupillary distance adjustment horizontal frame for measuring the interpupillary distance; the cross cylinder part for measuring the axial position and angle of adjusting astigmatis...

AI Technical Summary

Problems solved by technology

For the measurement of the interpupillary distance, whether it is a domestic or imported manual comprehensive refractor, it adopts an overall adjustment structure. Although the adjustment speed of this structure is relatively fast, it does not conform to the actual situation of the human body. In terms of interpupillary distance adjustment Both can only achieve symmetrical adjustment, that is, when adjusting the interpupillary distance, you can only walk on both sides at the same time

Although the eyes of most human beings are symmetrical with respect to the bridge of the nose, not all of them are. Therefore, although the structure of walking on both sides can adjust the interpupillary distance relatively quickly, for people whose pupils are not symmetrical with respect to the bridge of the nose, Eyes worn after measuring the interpupillary distance will make the eyes feel tired and uncomfortable

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