Binocular open-view instrument to measure aberrations and pupillary dynamics

Area of Science:

• Ophthalmic and Vision Science
• Optical Engineering
• Biomedical Instrumentation

Background:

• Accurate measurement of ocular aberrations is crucial for understanding visual optics.
• Existing wavefront sensing methods often require subjects to fixate on specific targets, limiting naturalistic measurements.
• A need exists for unobtrusive, real-time measurement of binocular eye aberrations under dynamic viewing conditions.

Purpose of the Study:

• To design and construct a novel binocular Hartmann-Shack wavefront sensor.
• To enable real-time, unobtrusive measurement of aberrations in both eyes simultaneously.
• To facilitate the assessment of ocular optics under natural viewing conditions.

Main Methods:

• Development of a binocular sensor utilizing a single microlens array and camera.
• Integration of an invisible 1050 nm laser diode for illumination.
• Implementation of an open-view configuration for naturalistic subject viewing.
• Simultaneous measurement of wavefront aberrations, convergence, pupil size, and accommodation.

Main Results:

• Successful design and fabrication of the binocular Hartmann-Shack wavefront sensor.
• Demonstration of real-time, simultaneous aberration measurement for both eyes.
• Validation of unobtrusive measurements under natural viewing conditions using invisible illumination.
• Achieved a large dynamic range for comprehensive ocular parameter assessment.

Conclusions:

• The developed open-view binocular wavefront sensor enables unobtrusive, real-time ocular aberration measurement.
• Its design allows for studies under natural visual conditions and integration with other vision testing equipment.
• This technology holds significant potential as a versatile tool for various visual optics research applications.