PURPOSE: To develop a prototype instrument that uses adaptive optics to introduce virtually any desired aberration profile in a subject's eye. At the same time, the instrument could be used to evaluate the subject's spatial vision for each controlled aberration profile. This "aberration testing station" or "visual simulator" allows us to study the relationship between specific aberrations and visual quality. METHODS: The apparatus uses infrared light to measure the wavefront aberration of the system plus the eye with a Hartmann-Shack wavefront sensor. Defocus is added (or removed) with a computer-controlled, motorized optometer, while higher order aberrations are introduced by a 37-channel membrane deformable mirror. A parallel viewing channel is used for visual testing with the instrument. Visual acuity, contrast sensitivity, and other visual tests are performed under normal viewing for each desired aberration profile. RESULTS: The range of defocus that can be added is nearly unlimited, while the maximum amount of other aberration modes is restricted to approximately 0.5 microm, depending on mode. Pure modes or any selected combination of modes can be produced with high repeatability and precision (usually better than 0.05 microm), and the system works for pupil diameters up to 6 mm (with a natural pupil). CONCLUSIONS: The adaptive optics visual simulator is a powerful, non-invasive tool to evaluate how aberrations affect vision. In addition, it can be used for the interactive design and testing of new ophthalmic devices, and for the simulation of visual outcomes in customized refractive surgery.
PURPOSE: To develop a prototype instrument that uses adaptive optics to introduce virtually any desired aberration profile in a subject's eye. At the same time, the instrument could be used to evaluate the subject's spatial vision for each controlled aberration profile. This "aberration testing station" or "visual simulator" allows us to study the relationship between specific aberrations and visual quality. METHODS: The apparatus uses infrared light to measure the wavefront aberration of the system plus the eye with a Hartmann-Shack wavefront sensor. Defocus is added (or removed) with a computer-controlled, motorized optometer, while higher order aberrations are introduced by a 37-channel membrane deformable mirror. A parallel viewing channel is used for visual testing with the instrument. Visual acuity, contrast sensitivity, and other visual tests are performed under normal viewing for each desired aberration profile. RESULTS: The range of defocus that can be added is nearly unlimited, while the maximum amount of other aberration modes is restricted to approximately 0.5 microm, depending on mode. Pure modes or any selected combination of modes can be produced with high repeatability and precision (usually better than 0.05 microm), and the system works for pupil diameters up to 6 mm (with a natural pupil). CONCLUSIONS: The adaptive optics visual simulator is a powerful, non-invasive tool to evaluate how aberrations affect vision. In addition, it can be used for the interactive design and testing of new ophthalmic devices, and for the simulation of visual outcomes in customized refractive surgery.
Authors: Susana Marcos; John S Werner; Stephen A Burns; William H Merigan; Pablo Artal; David A Atchison; Karen M Hampson; Richard Legras; Linda Lundstrom; Geungyoung Yoon; Joseph Carroll; Stacey S Choi; Nathan Doble; Adam M Dubis; Alfredo Dubra; Ann Elsner; Ravi Jonnal; Donald T Miller; Michel Paques; Hannah E Smithson; Laura K Young; Yuhua Zhang; Melanie Campbell; Jennifer Hunter; Andrew Metha; Grazyna Palczewska; Jesse Schallek; Lawrence C Sincich Journal: Vision Res Date: 2017-02-27 Impact factor: 1.886
Authors: Walter Torres-Sepúlveda; Alejandro Mira-Agudelo; John Fredy Barrera-Ramírez; Krzysztof Petelczyc; Andrzej Kolodziejczyk Journal: Transl Vis Sci Technol Date: 2020-02-12 Impact factor: 3.283