Electronic diopsimeter with functions of eyeball tracking and refraction compensation
An eye tracking and perimetry technology, applied in the field of medical devices, can solve the problems of no automatic compensation for refractive error, narrowing sensitivity, and diffuse decrease in visual field sensitivity
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Embodiment 1
[0046] The structure of embodiment 1 electronic perimetry
[0047] The structure of an exemplary electronic perimetry is as Figure 1-2 As shown, it includes a housing 5 and a flat electronic vision screen 1. It is characterized in that the housing 5 has a cylindrical peeping channel 51, and the circular opening of the peeping channel 51 enables the subject to watch the housing from the outside of the housing 5. 5 inside; Peep channel 51 cylinder side circumference is equidistantly installed with 8 infrared lighting lamps 4 for emitting infrared rays to the subject's eyeball; peep channel (51) is connected with refractive correction system 3 inside, thereby sealing the shell Inside the body 5; the refractive correction system 3 is a turntable, on which 12 refractive correction aspheric lenses 31 are equidistantly distributed, wherein the correction degrees of the 12 refractive correction lenses (31) are respectively +6, +5, +4, +3, +2, +1, 0, -1, -2, -3, -4, and -5, so that the...
Embodiment 2
[0048] Example 2 Quantitatively evaluate the degree of cooperation of the subject
[0049] When testing the field of vision, the subject's eyes always fixate on the fixation point on the flat electronic vision screen 1 and look at the visual mark with peripheral vision, and adjust the refractive correction system 3 so that the subject can clearly see the visual mark on the electronic screen. Then, after the calculation system selects the three marker points in the eyeball of the subject, when the spatial coordinates are (S x , S y , 0) when the position S displays the visual mark, record the coordinates of the positions A, B, and C of the three mark points: A(A x , A y , A z ); B(B x , B y , B z ); C(C x , C y , C 2 ,);
[0050] Then, in the actual space coordinates are (S 1x0 , S 1y0 , 0) at position S 0 When the visual target is displayed, record the position A of the three marked points after displacement 1 , B 1 、C 1 Coordinates: A 1 ( A z1 ); B 1 (B ...
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