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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause. Causes include: Refractive errors; Divergence insufficiency; Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies.
Area served City of license VC RF Callsign Network Notes Boston: 2 5 WGBH-TV: PBS: World on 2.2 : 4 20 WBZ-TV: CBS: Start TV on 4.2, Dabl on 4.3, Fave TV on 4.4 : 5 33 WCVB-TV: ABC: MeTV on 5.2, Story Television on 5.3
Esotropia is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [1] It is the opposite of exotropia and usually involves more severe axis deviation than esophoria. Esotropia is sometimes erroneously called ...
Jennifer and Eric Mauchan live in a Cape Cod-style house in Framingham, Massachusetts that they've been cooling with five air conditioners. In the summer, the electric bill for the 2,600-square ...
Jurors in the murder case against Karen Read, the Massachusetts woman accused of running down and killing her police officer boyfriend John O'Keefe in 2022, continue deliberations.
NASA accidentally broadcast a simulation of astronauts being treated for decompression sickness on the International Space Station (ISS) on Wednesday, prompting speculation of an emergency in ...
Affiliated stations and facilities. WGBH-TV is the flagship property of the WGBH Educational Foundation, which also owns Boston's secondary PBS member WGBX-TV (channel 44) and Springfield, Massachusetts PBS member WGBY-TV (channel 57, operated by New England Public Media), Class A Biz TV affiliate WFXZ-CD (channel 24) and public radio stations WGBH (89.7 FM) and WCRB (99.5 FM) in the Boston ...