A phoropter or refractor is an ophthalmic testing device. It is commonly used by eye care professionals during an eye examination, and contains different...

The prescription is typically determined during a refraction, using a phoropter and asking the patient which of two lenses is better, or by an automated...

lenses used in refraction testing Ishihara Plate 9 Ishihara Plate 23 A phoropter NdYAG Laser Lacrimal canula Ophthalmology Oral & Practical 3rd edition...

responses from the patient. Typically, the patient will sit behind a phoropter or wear a trial frame and look at an eye chart. The eye care professional...

eyes for spectacles is done with modern instruments, such as the phoropter. "Phoropter" is one of several generic names for modern instruments containing...

movement of the reflex or manually places lenses over the eye (using a phoropter or trial frame and trial lenses) to "neutralize" the reflex. Static retinoscopy...

cross cylinders in a phoropter may be used to subjectively refine those measurements. An alternative technique with the phoropter requires the use of a...

subjective refraction tests. Here, lenses are switched in and out of a phoropter and the patient is asked "which looks better" while looking at a chart...

off. At the optometrist, Heidi angrily confronts Larry and slams the phoropter against his eyes. Larry, with blurry vision again, rear-ends a woman with...

the patient's eye with the same effective power that it did through the phoropter or trial frame. Vertex distance is important when converting between contact...