 |
|
|
|
 |
|
 |
ach•ro•mat•ic
Designating colour perceived to have zero saturation and therefore
no hue, such as neutral grays, white, or black |
 |
|
 |
|
|
|
|
 |
 |
bi•fo•cal
(of an eyeglass or contact lens) having two portions, one for near
and one for far vision. |
 |
|
 |
|
|
 |
 |
deu•ter•a•no•pi•a
A form of colorblindness characterized by insensitivity to green.
|
 |
|
 |
|
|
 |
 |
di•a•be•tes
A disorder of carbohydrate metabolism, usually occurring in genetically
predisposed individuals, characterized by inadequate production or
utilization of insulin and resulting in excessive amounts of glucose
in the blood and urine, excessive thirst, weight loss, and in some
cases progressive destruction of small blood vessels leading to such
complications as infections and gangrene of the limbs or blindness. |
 |
|
 |
|
|
 |
 |
di•chro•mat•ic
Possessing or exhibiting two colors. Deficiency in one cone pigment,
but preserves the remaining two cone pigments.
|
 |
|
 |
|
|
 |
 |
dys•lex•i•a
Any of various reading disorders associated with impairment of the
ability to interpret spatial relationships or to integrate auditory
and visual information. |
 |
|
 |
|
|
 |
 |
glau•co•ma
Abnormally high fluid pressure in the eye, most commonly caused either
by blockage of the channel through which aqueous humor drains (open-angle
glaucoma or chronic glaucoma) or by pressure of the iris against the
lens, which traps the aqueous humor (angle-closure glaucoma or acute
glaucoma). |
 |
|
 |
|
|
 |
 |
ker•a•to•co•nus
A degenerative condition characterized by conical protrusion of the
cornea and irregular astigmatism. |
 |
|
 |
|
|
 |
 |
mon•o•chro•mat•ic
Having or appearing to have only one color. Occurs when two of the
types of cones malfunction resulting in single cone vision. |
 |
|
 |
|
|
 |
 |
nys•tag•mus
A congenital or acquired persistent, rapid, involuntary, and oscillatory
movement of the eyeball, usually from side to side. |
 |
|
 |
|
|
 |
 |
pro•ta•no•pi•a
A form of colour blindness characterised by defective perception of
red and confusion of red with green or bluish green.
|
 |
|
 |
|
|
 |
 |
tri•chro•mat•ic
Having perception of the three primary colors, as in normal vision.
|
 |
|
 |
|
|
 |
 |
tri•tan•op•ic
Deficiency of the cone pigment for blue as well as blue-green and
yellow-green insensitivity. |
 |
|
 |
|
