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A rigid gas-permeable lens, also known as an RGP lens, GP lens, or colloquially, a hard contact lens, is a rigid contact lens made of oxygen-permeable polymers. Initially developed in the late 1970s, and through the 1980s and 1990s, they were an improvement over prior 'hard' lenses that restricted oxygen transmission to the eye.
Meaning [1] Latin (or Neo-Latin) origin [1] a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night Omne Nocte a.s., as, AS left ear auris sinistra a.u., au, AU both ears together or each ear aures unitas or auris uterque b.d.s, bds, BDS 2 times a day bis die sumendum b.i.d., bid, BID
left eye o can be mistaken as an a which could read "a.s.", meaning left ear o.u. oculus uterque: both eyes o can be mistaken as an a which could read "a.u.", meaning both ears oz ounce p. perstetur: continue part. æq. partes æquales: equal parts per: per: by or through p.c. post cibum: after meals p.c.h.s., pc&hs post cibum et hora somni
Woman had 23 daily disposable contact lenses stuck deep underneath her eyelid, her eye doctor said. Ophthalmologist recorded the clump of lenses being removed.
DS: Dioptres sphere DV: Distance vision DVD: Dissociated vertical deviation EF: Eccentric fixation FB: Foreign body FD: Fixation disparity FF: Foveal fixation FHG: Family history of glaucoma: FMH: Family medical history FOH: Family ocular history F/U: Follow up appointment GH: General health G(M)P: General (medical) practitioner HA: Headaches HARC
However, the physical composition of cosmetic contact lenses themselves also plays a role in increasing the risk of long-term corneal complications. The surface of cosmetic contact lenses are often rougher than their prescription counterparts, and this increases the risk of mechanical trauma to both the inside of the eyelid as well as the cornea.
Artist's impression of Leonardo's method for neutralizing the refractive power of the cornea. Leonardo da Vinci is frequently credited with introducing the idea of contact lenses in his 1508 Codex of the eye, Manual D, [9] wherein he described a method of directly altering corneal power by either submerging the head in a bowl of water or wearing a water-filled glass hemisphere over the eye.
DS: disease Down syndrome (trisomy 21) diopters sphere DSA: digital subtraction angiography Donor specific antibody: DSD: differences of sex development dry sterile dressing: Dsg: dressing: DSM: Diagnostic and Statistical Manual of Mental Disorders: dsRNA: double-stranded RNA: DT: diphtheria-tetanus (combined vaccination) delirium tremens: D/T ...