CN2302569Y

CN2302569Y - Shadow testing optometry training device

Info

Publication number: CN2302569Y
Application number: CN 97228766
Authority: CN
Inventors: 彭小平
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-20
Filing date: 1997-10-20
Publication date: 1998-12-30
Anticipated expiration: 2007-10-20

Abstract

The utility model relates to a shadow testing optometry training device for an oculist and an optometrist and is a rectangle frame, comprising a front surface plate, a back surface plate and a regulating mechanism. The center of the front surface plate is embedded with a convex lens, and the two surfaces of the convex lens are symmetrically provided with lens piece cards. The front surface plate and the two inner side plates form a fixing frame, and the back surface plate and four borders form a motional frame. The inner side plate tooth shaft of the regulating mechanism is engaged with tooth strips on the borders to cause the motional frame to slide along the inner side plate. Therefore, the distance between the back surface plate and the convex lens can be measured. The oculist and the optometrist can skillfully master the shadow testing optometry technique during the process of looking for every neutralization point by using the training device. The shadow testing optometry training device has novel structure and convenient use, and particularly can regulate and change the diopter optionally and continuously.

Description

The retinoscopy optometry training aids

The utility model relates to a kind of retinoscopy optometry training aids, and it is that eye doctor and optist carry out the retinoscopy optometry trainer.

Eye doctor and optist's training is all directly practised on human eye under teacher instructs clinically.Since the dioptric complexity of human eye, mydriasis medicine influence degree difference, and lack absolute standard etc., make that the retinoscopy optometry technology is difficult to grasp.

The purpose of this utility model provides a kind of retinoscopy optometry training aids, and it is regulated at any time and set dioptric optical value in order to the simulation human eye, and point of neutralization (rollback point) is sought in exercise voluntarily, carries out the retinoscopy optometry training.

The purpose of this utility model is to realize like this, it is that a rectangular frame is engineering plastics and makes, and comprises front panel, rear panel and front and back panel distance adjusting mechanism, it is characterized in that front panel central authorities have a circular hole to be embedded with convex lens, is that two sides, center symmetry is equipped with the eyeglass card with convex lens; Front panel and two interior plates constitute Jiong shape and decide framework, insert the regulating tooth axle in the trepanning of the bottom of two interior plates; Rear panel and four edges frame constitute moving framework, and two frames in top are type groove, and scale is housed thereon; Two frames in bottom are type groove, at type trough rim lateral surface top tooth bar are housed, and the four edges groove can slide along bottom surface on two interior plates, and the tooth of regulating tooth axle and tooth bar engagement simultaneously is used to regulate distance between front and back panel.

Being carved with millimeter owing to corresponding scale place on biside plate is the unit scale, thereby measures accurate distance between front panel convex lens and the rear panel, can extrapolate corresponding diopter.

Description of drawings:

Fig. 1: the utility model one-piece construction synoptic diagram;

The left side synoptic diagram of Fig. 2: Fig. 1;

The front elevational schematic of Fig. 3: Fig. 1.

Accompanying drawings the utility model structure situation.

By Fig. 1～3, this training aids is a rectangular frame box, makes by engineering plastics, and it has front panel 1, rear panel 15 and front and back panel distance adjusting mechanism.Front panel 1 central authorities have a circular hole to be embedded with convex lens 3, are that two eyeglass cards 2 and 2 ' are fixed with screw 8 symmetrically in the two sides, center with convex lens 3, and plate is got a foothold in front two stators 6, and fixed orifice 7 is arranged in it.Front panel 1 and two interior plates 4 constitute Jiong shape and decide framework, insert regulating tooth axle 10 in the trepanning of two interior plates, 4 bottoms.Rear panel 15 inner faces are painted redness, observe red base plate at 3 one meters of distance convex lens and can simulate human eye do inspection shadow in the map of lens.When red base plate up and down or during move left and right, can observe red map Cheng Shundong or reserve motion.Rear panel 15 and four

edges frame

12,13 constitute moving framework, and two frames in top 12 are type groove, are stuck on the upper bottom surface of two interior plates 4, and two frames in its underpart 13 are type groove, are stuck in the bottom surface of two interior plates 4; The four edges groove all horizontally slips along two interior plates 4.Tooth bar 11 is equipped with at lateral surface top at bottom groove frame, and tooth axle 10 and tooth bar 11 are metal material and make, and makes it mutually meshing with the tooth axle on the interior plate, and turning gear axle 10 can change distance between rear panel 15 and the front panel 1.

On two upper side frames 12 of moving frame scale 9 is housed respectively, the end face at two interior plates, 4 places of corresponding scale is carved with millimeter and is unit scale 5, can accurately measure the distance of rear panel 15 and front panel convex lens 3, extrapolates corresponding diopter.

If when selecting for use suitable dioptric convex lens A to be added in the eyeglass card 2 of front panel convex lens 3, can be with movable red map in the lens 3, correct the ruddiness that flashes across that becomes to be full of whole lens 3, keep transfixion as making rear panel 15 and lens 3 and observing one meter eye this moment, the then visible stable ruddiness that is full of whole lens, Here it is the inspection shadow neutralization resemble, (D is a refractive diopter according to D=1/f, f is a focal length rice number) can to extrapolate between rear panel 15 and the front panel convex lens 3 distance be in forming under f one stable condition and the actual number of degrees of the required lens of video, the difference of the diopter of this actual needs and lens 3 adds 1 again, and the number of degrees that are exactly point of neutralization are the number of degrees of lens A.Be formulated A=1/f-B+1 (f is a focal length rice number, and B is the number of degrees of lens 3, and A is the point of neutralization number of degrees).Inspection shadow training aids be exactly between the red base plate of convex lens and rear panel by the fixing number of degrees distance form the different diopters that can accurately know by inference, make trainer's familiar grasp retinoscopy optometry technology in the process of seeking each accurate point of neutralization repeatedly.

This training aids novel structure, simple to operate, easy to use, especially can arbitrarily change diopter continuously, as long as a light source and a reflective skiascope arranged in a cell, with training aids be fixed on practitioner's eyes with 1 meter, high the place ahead, can learn by oneself exercise.

Claims

1, a kind of retinoscopy optometry training aids, it is a rectangular frame, comprise front panel (1), rear panel (15) and front and back panel distance adjusting mechanism, it is characterized in that: front panel (1) central circular hole is embedded with convex lens (3), with convex lens is that two sides, center symmetry is equipped with eyeglass card (2 and 2 '), front panel (1) constitutes the Jiong type with two interior plates (4) and decides framework, inserts regulating tooth axle (10) in the trepanning of biside plate (4) bottom; Inner face scribbles red rear panel (15) and constitutes moving framework with four edges frame (12,13), and two frames in its top (12) are type groove, on the frame (12) scale are housed simultaneously; Two frames in bottom (13) are type groove, at type groove lateral surface top tooth bar (11) are housed, and this four edges frame can slide along the last bottom surface of two interior plates (4), the tooth of regulating tooth axle and tooth bar (11) engagement simultaneously.

2, according to the described retinoscopy optometry training aids of claim 1, it is characterized in that: be carved with the millimeter at the corresponding scale of two interior plates (4) end face place is the scale of unit.