Developing Dynamic Compensation System for Eye Defocus Based on Image Processing

Table 1. Actual and measured values of a dime with different angles
View table
Table 1. Actual and measured values of a dime with different angles
Bevel angle 0° 15° 30° 45° 60° 75°
Actual value /mm 19
Measured value /mm 19.002 18.994 18.996 18.995 19.007 18.991

Table 2. Measured pupil diameters by commercial infrared pupil meter and the proposed method
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Table 2. Measured pupil diameters by commercial infrared pupil meter and the proposed method
Measurement method Pupil diameter /mm
Infrared pupil meter 3.2 3.4 3.7 3.9 4.2 4.5 4.7 4.9 5.2 5.4
Proposed method 3.199 3.401 3.701 3.900 4.202 4.499 4.702 4.898 5.201 5.399

Table 3. Nominal value of the deformable lens and the measured value of the lensometer
View table
Table 3. Nominal value of the deformable lens and the measured value of the lensometer
Device Refractive power /D
Deformable lens -10 -8 -6 -4 -2 0 2 4 6 8 10
Lensometer -9.97 -8.02 -6.01 -4.01 -2.00 0.00 2.00 4.01 5.98 8.03 10.04

Table 4. Visual acuity chart readings of dynamic compensation system for human eye defocus before and after adjustment under different light intensities

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Table 4. Visual acuity chart readings of dynamic compensation system for human eye defocus before and after adjustment under different light intensities

Condition				Visual acuity chart reading
Condition	Ametropic eye A			Ametropic eye B			Ametropic eye C
Before correction	4.4	4.5	4.6	4.1	4.2	4.3	4.0	4.1	4.2
After correction	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0
Corresponding pupil diameter /mm	5.341	3.542	2.278	5.041	2.760	2.124	5.521	3.353	2.106

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Zhongxiang Zhang, Chongxiang Xu, Weijiang Yan, Yufeng Su, Zhigang Jia. Developing Dynamic Compensation System for Eye Defocus Based on Image Processing[J]. Laser & Optoelectronics Progress, 2023, 60(24): 2423001

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Paper Information

Category: Optical Devices

Received: Mar. 7, 2023

Accepted: May. 8, 2023

Published Online: Nov. 27, 2023

The Author Email: Zhigang Jia (jiazhigang@zzu.edu.cn)

DOI:10.3788/LOP230784

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Actual and measured values of a dime with different angles

Table 1. Actual and measured values of a dime with different angles

Table 2. Measured pupil diameters by commercial infrared pupil meter and the proposed method

Table 2. Measured pupil diameters by commercial infrared pupil meter and the proposed method

Table 3. Nominal value of the deformable lens and the measured value of the lensometer

Table 3. Nominal value of the deformable lens and the measured value of the lensometer

Table 4. Visual acuity chart readings of dynamic compensation system for human eye defocus before and after adjustment under different light intensities

Table 4. Visual acuity chart readings of dynamic compensation system for human eye defocus before and after adjustment under different light intensities