May 8, 2009 (Fort Lauderdale, Florida) — In a comparison study of best corrected electronic visual acuity (EVA) testing, autorefraction (AR-EVA) and Diabetic Retinopathy Clinical Research (DRCR) ...

Please provide your email address to receive an email when new articles are posted on . We ophthalmologists are all introduced to pinhole or small-aperture optics on the first day of our residency ...

Pinhole marker or Purkinje images of the microscope can be used to get a centrally located pupil and the pinhole pupil size to 1.5 mm. A pinhole marker (Figure 5) sized 1.5 mm is employed for gauging ...

Records of the natural optical phenomenon of the “camera obscura” pinhole image date back as far as 500 B.C.E. Between the 16th and 19th centuries, it was commonly used as a drawing aid. Artists would ...

Researchers have used the centuries-old idea of pinhole imaging to create a high-performance mid-infrared imaging system without lenses. The new camera can capture extremely clear pictures over a ...