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Usually, the pupils of the eyes become small, or constrict, in response to a strong light source, such as sunlight. Certain medications, drugs or ailments also cause small pupil size.
Compact line-field oct system with intolerance to spurious reflections
A compact line- or full-field optical coherence tomography (OCT) system designed for high-resolution retinal imaging with reduced artifacts employs quarter wave plates in both the sample and reference arms to manipulate the polarization state of light, effectively suppressing spurious reflections and coherence repeat artifacts. A symmetrical arrangement of, for example, Plössl eyepiece and camera objective lenses minimizes optical aberrations and maintains a flat imaging field despite the retina's curvature. The scanning galvanometer mirror is positioned at the conjugate plane of the patient's eye pupil and sized to act as an aperture stop. An adjustable eyepiece compensates for individual refractive errors, enhancing image clarity across a wide range of patients.
Owner:KINEOLABS INC