| FA | false aneurysm; Families Anonymous; Fanconi anemia; far advanced; fatty acid; febrile antigen; femor... |
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| FLASH | fast low angle shot; fluorescence in situ hybridization |
| FMA | Frankfort mandibular plane angle |
| GPOA | primary open angle glaucoma |
| IMPA | incisal mandibular plane angle |
| far point of eye | <microscopy> For the normal eye, the far point is at infinity. The rays of light from an infinitely distant point source are parallel and can be focused with the accommodation muscles of the eye entirely relaxed. See: accommodation, near point of the eye. (05 Aug 1998) |
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| ferret-eye | <zoology> The spur-winged goose; so called from the red circle around the eyes. Source: Websters Dictionary (01 Mar 1998) |
| fibrous tunic of eye | The outer layer of the eyeball composed of the sclera and cornea. Synonym: tunica fibrosa bulbi, tunica externa oculi. (05 Mar 2000) |
| fish eye disease | <disease> An inherited disorder resulting in low HDL cholesterol and corneal opacities; also, low LCAT activity. (05 Mar 2000) |
| fixing eye | The eye, in cases of strabismus, that is directed toward the object of regard. (05 Mar 2000) |
| fluorescein eye examination | A special test that allows the examiner to detect cornea abrasions or corneal foreign bodies. An orange dye (fluorescein) is placed into the eye and the eye is illuminated with a cobalt blue light (black light). This serves to highlight any irregularities in the corneal surface. (27 Sep 1997) |
| lazy eye | An eye that diverges in gaze. More formally called strabismus. Can be esotropia (cross-eyed) or exotropia (wall-eyed). (12 Dec 1998) |
| lens, eye | <microscopy> The lens in an eyepiece nearest to the eye. (05 Aug 1998) |
| light-adapted eye | An eye that has been exposed to light, with bleaching of rhodopsin (visual purple) and insensitivity to low illumination. Synonym: photopic eye. (05 Mar 2000) |
| Listing's reduced eye | A representation that simplifies calculations of retinal imagery: radius of anterior refracting surface, 5.1 mm; total length, 20 mm; distance of nodal point to retina, 15 mm. (05 Mar 2000) |
| acromial angle | The prominent angle at the junction of the posterior and lateral borders of the acromion. Synonym: angulus acromialis. (05 Mar 2000) |
| acute angle | Any angle less than 90 |
| acute angle closure glaucoma | <ophthalmology> An increase in pressure within the anterior chamber of the eye. There are two forms of glaucoma: acute angle closure and open angle glaucoma. (27 Sep 1997) |
| adjacent angle | An angle with a line in common with another angle. (05 Mar 2000) |
| alpha angle | The angle between the visual and optic axes as they cross at the nodal point of the eye, the angle between the visual line and the major axis of the corneal ellipse. (05 Mar 2000) |