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File:COVID-19 Vaccination Record Card CDC (8-17-2020).pdf. Size of this JPG preview of this PDF file: 710 × 599 pixels. Other resolutions: 284 × 240 pixels | 569 × 480 pixels | 725 × 612 pixels. Original file (725 × 612 pixels, file size: 52 KB, MIME type: application/pdf, 2 pages) Wikimedia Commons Commons is a freely licensed media ...
Amblyopia. Anisometropia is a condition in which a person's eyes have substantially differing refractive power. [1] Generally, a difference in power of one diopter (1D) is the threshold for diagnosis of the condition . [2] [3] Patients may have up to 3D of anisometropia before the condition becomes clinically significant due to headache, eye ...
The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Specialty. Ophthalmology. Exotropia is a form of strabismus where the eyes are deviated outward. It is the opposite of esotropia and usually involves more severe axis deviation than exophoria. People with exotropia often experience crossed diplopia. Intermittent exotropia is a fairly common condition. "Sensory exotropia" occurs in the presence ...
Surgery or special glasses (prisms) may be advised if there is no recovery in 6 to 12 months. If diplopia turns out to be intractable, it can be managed as last resort by obscuring part of the patient's field of view. This approach is outlined in the article on diplopia occurring in association with a condition called horror fusionis. See also
A Schmidt–Pechan prism is a type of optical prism used to rotate an image by 180°. These prisms are commonly used in binoculars as an image erecting system. The Schmidt–Pechan prism makes use of a roof prism section (from the German: "Dachkante", lit. roof edge ). Binoculars designs using Schmidt–Pechan prisms can be constructed more ...
File:Antiprisms.pdf. Size of this JPG preview of this PDF file: 800 × 566 pixels. Other resolutions: 320 × 226 pixels | 640 × 452 pixels | 1,024 × 724 pixels | 1,280 × 905 pixels | 2,481 × 1,754 pixels. This is a file from the Wikimedia Commons. Information from its description page there is shown below.
The prism is named for its inventors, the French instrument maker Ph. Pellin and professor of physiological optics André Broca. [1] The prism consists of a four-sided block of glass shaped as a right prism with 90°, 75°, 135°, and 60° angles on the end faces. Light enters the prism through face AB, undergoes total internal reflection from ...