Hand-hold screen display type direct ophthalmoscope

Abstract

The invention relates to a hand-held screen display type direct ophthalmoscope, which comprises a shell, as well as a lighting system and an observation system which are arranged in the shell. The observation system comprises a peephole, a focusing compensation system, a micro-camera system, an analog-digital conversion component, a screen display system and a micro-control system. All systems and components of the whole direct ophthalmoscope are jointly positioned in the shell which can be held and operated with a single hand. Compared with the direct ophthalmoscope which carries out examinations through the peephole, the direct ophthalmoscope of the invention does not require the close contact of the faces of an examiner and an examined person or require the examiner to adopt a passive body position to cater for the examined person during examinations. Therefore, the direct ophthalmoscope has the advantages that the direct ophthalmoscope is convenient and comfortable to use and easy to determine examination positions and immediately record discoveries during the examinations at will for careful analysis and judgment according to examination situations displayed on a screen, thereby reducing unnecessary examination time.

Description

technical field [0001] The invention relates to a medical examination equipment, in particular to a hand-held screen display direct ophthalmoscope suitable for inspection and photography of the refractive medium of the eye, the fundus of the eye and other parts of the body such as local skin, ear holes and nostrils. Background technique [0002] A direct ophthalmoscope is an instrument used to examine the refractive medium and retina. At present, the known direct ophthalmoscope in the world includes two parts, an illumination system and an observation system. The lighting system consists of bulbs, condenser lenses, diaphragms, filters and reflectors. The observation system includes a peephole and a focus compensation system. The focus compensation system is used to compensate or neutralize the combined refractive error between the examiner and the examinee to obtain a clear observation of the examined fundus. This system is a carousel of focus compensating optics consisti...

AI Technical Summary

Problems solved by technology

This inspection method of observing through the peephole requires the user's face and eyes to be close to the direct ophthalmoscope so that the faces of the inspector and the inspected are very close, causing inconvenience and discomfort; The ophthalmoscope is convenient for observation. The examiner needs to adopt a passive position and posture (or bow or bend over) that caters to the position of the examinee's head. It is very easy to get tired and it is difficult to observe the fundus for a long time.

In the process of using the ophthalmoscope to check, the user often adjusts the posture due to uncomfortable postures, which makes the ophthalmoscope lens leave the inspected part. The user often needs to move the ophthalmoscope many times to find the part to be inspected to complete the alignment. The observation of the inspection site increases the inspection time and increases the fatigue and discomfort of the examiner and the examinee. The inconvenient use of the direct inspection mirror often causes the doctor to stop the inspection halfway and use other inspection methods such as fundus photography, which is a waste of time. Time adds to inspection costs

[0004] On the other hand, the situation observed through the direct ophthalmoscope cannot be recorded in the form of images or pictures in real time, which is not conducive to explaining the examination results to the examinee, nor is it conducive to the communication and discussion of the examination situation between doctors

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