| scotoma | 1. An area of lost or depressed vision within the visual field, surrounded by an area of less depressed or of normal vision. 2. Mental scotoma Origin: Gr. Skotoma (18 Nov 1997) |
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| scotomata | Plural of scotoma. (05 Mar 2000) |
| scotomatous | Relating to scotoma. (05 Mar 2000) |
| scotometer | An instrument for determining the size, shape, and intensity of a scotoma. (05 Mar 2000) |
| scotometry | The plotting and measuring of a scotoma. Origin: scoto-+ G. Metron, measure (05 Mar 2000) |
| scotomy | 1. Dizziness with dimness of sight. 2. <medicine> Obscuration of the field of vision due to the appearance of a dark spot before the eye. Origin: NL. Scotomia, from Gr. Dizziness, fr. To darken, fr. Skotos darkness: cf. F. Scotomie. Source: Websters Dictionary (01 Mar 1998) |
| scotophilia | Synonym: nyctophilia. Origin: scoto-+ G. Philos, fond (05 Mar 2000) |
| scotophobia | Synonym: nyctophobia. Origin: scoto-+ G. Phobos, fear (05 Mar 2000) |
| scotopia | Synonym: scotopic vision. Origin: scoto-+ G. Opsis, vision (05 Mar 2000) |
| scotopic | Referring to low illumination to which the eye is dark-adapted. See: scotopic vision. (05 Mar 2000) |
| scotopic adaptation | The adjustment of the eye occurring under reduced illumination in which the sensitivity to light is greatly increased or the light threshold is greatly reduced. Dark adaptation is slower than light adaptation. During dark adaptation rhodopsin is built up in the retinal rods. (12 Dec 1998) |
| scotopic eye | An eye that has been in darkness or semidarkness and has undergone regeneration of rhodopsin (visual purple), which renders it more sensitive to reduced illumination. Synonym: scotopic eye. (05 Mar 2000) |
| scotopic perimetry | Perimetry of a dark-adapted eye. (05 Mar 2000) |
| scotopic vision | Vision when the eye is dark-adapted. See: dark adaptation, dark-adapted eye. Synonym: night vision, rod vision, scotopia, twilight vision. (05 Mar 2000) |
| scotopsin | The protein moiety of the pigment in the rods of the retina. (05 Mar 2000) |