Replacing dihydric esters with monohydric variants prevents phase separation and haze, enabling dry extraction of high-yield silicon hydrogel lenses.
Bending the optical axis with a mirror reduces device volume while maintaining wide-angle visual field coverage.
A tomographic image capturing apparatus uses a single detector to acquire interference and reference signals for noise correction.
A computational method predicts postoperative vitreous length using preoperative ocular parameters to determine precise intraocular lens power.
A programmable phase map adjusts light wave phases to form images directly on the retina using a two-dimensional waveguide.
An undercut ledge on the back surface engages the lower eyelid, enabling reliable 2-5 mm translation of soft bifocal lenses without front-surface ridges.
A vision testing system adjusts display luminance using a sensor to ensure consistent light levels.
Consumer digital image sensor captures user head image with known reference object to determine ocular distances.
A gaze point detection unit tracks examinee eye position to control indicator display timing on a screen.