rod-cone theory

space

U+0020

hyphen-minus

U+002D

latin small letter c

U+0063

latin small letter d

U+0064

latin small letter e

U+0065

latin small letter h

U+0068

latin small letter n

U+006E

latin small letter o

U+006F

latin small letter r

U+0072

latin small letter t

U+0074

latin small letter y

U+0079