Evaluation of newly-developed aniseikonia testing method based on space eikonometry

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• A novel aniseikonia testing method, space eikonometry (ATSE), has been developed.
• The conventional new aniseikonia tests (NAT) is widely used in Japan for aniseikonia assessment.

Purpose of the Study:

• To compare the accuracy of aniseikonia measurements obtained by the ATSE method against the conventional NAT.

Main Methods:

• Thirty healthy subjects with normal binocular vision were recruited.
• Aniseikonia was simulated using afocal lenses (5% and 10%) in the right eye.
• Measurements were taken three times using both ATSE and NAT, with averages used for analysis.

Main Results:

• ATSE yielded results closer to theoretical values (mean error +2%) compared to NAT (mean error -42%).
• ATSE measured 5.1% ± 0.8% and 10.1% ± 0.8% aniseikonia for 5% and 10% lenses, respectively.
• NAT measured 2.8% ± 1.3% and 6.0% ± 2.5% aniseikonia for 5% and 10% lenses, respectively.

Conclusions:

• The ATSE method demonstrates superior accuracy for quantitative aniseikonia determination.
• ATSE is recommended over NAT for precise clinical assessment of aniseikonia.