Color Vision Flashcards
Inherited Color Vision Defects
genetics same in both eyes red green males > females manageable but incurable
Acquired Color Vision Defects
injury or toxicity may differ between eyes, can change over time blue yellow males = females sometimes curable
L Cones
respond to long wavelengths
red
M Cones
Respond to medium wavelengths
Green
S Cones
Respond to short wavelenghts
Blue
Rods
detects light better in dim conditions
Normal Trichromats
All 3 cones function properly
Anomalous Trichromats
All 3 cones function, but one is sensitive to a different wavelength than normal
Dichromats
2 cones functioning
Monochromats
1 type of photopigment works (rods or 1 type of cone)
Protanopia
Dicromats lacking L cone
Red blind
Protanomalous
anomalous trichromat w/ bad L cone
Red weak
Deuteranopia
Lack M cone
Green Blind
Deuteranomalous
Functioning but bad M cone
Green weak
Tritanopia
Lack S cone
Blue Blind
Tritanomalous
Functioning but bad S cone
Blue weak
Typical Rod Monochromats
Only rods work; cones do not
bad VA
aversion to light
Atypical Cone Monochromats
1 functioning cone type
normal VA
X linked Inheritance
L and M cones
Red green defects
more common in males
Autosomal Inheritance
rod and S cone
blue yellow; rare
Chromatopsia
Toxicity causes objects to be seen in a particular color or tinge
Transformation Plates
normal and defect read 2 different things
Vanishing Plates
defect cannot read but normal can
Hidden Digit Plates
defect can read but normal cannot
