Binocular simulator of ophthalmic corrections with accommodation monitoring and convergence control

Visual simulators play a key role in the development of new visual corrections and in the prediction of the most suitable prescription for patients in the clinic. We present a novel binocular, open-view simulator incorporating automatic convergence control and simultaneous dynamic binocular aberrometry. In this configuration, all three accommodation cues (blur, proximity and convergence) are preserved, enabling realistic evaluation of different corrections. The system consists of a set of independent relay optics for each eye, allowing compensation of the patient’s refractive error and simulation of contact or intraocular lenses according to its spatial phase distribution. Using a single wavefront sensor with two regions of interest, ocular aberrations and accommodation are measured simultaneously in both eyes. Automatic convergence is achieved using one translational stage and two mirrors mounted on rotational motors for each eye, which maintain gaze alignment with the optical axis and the visual target. An additional translational stage positions the wavefront sensor in a conjugate pupil plane, ensuring accurate and stable measurements. This design allows patients to view stimuli at arbitrary distances while maintaining alignment with the system’s optical axis, with the simulated corrections (implemented via a spatial light modulator or a phase plate), centered or intentionally decentered relative to each pupil. Intended applications of the system include the evaluation of myopia control and presbyopia corrections, including multifocal lenses and monovision.