Tootfinder

S-cones (which respond to short wavelengths) are very few in the fovea center
so causing a so-called S-cone blind spot
(Williams et al., 1981)
but they peak in number on the foveal slope at about 12% of the population
https://www.ncbi.nlm.nih.gov/books/NBK11515/

S-Cone Pathways by Helga Kolb
There are differences in the genetic structure and locus of the S-cone visual pigment compared with the L- and M-cone pigments (Nathans et al., 1986), yet the S-cones are common to all vertebrate retinas and always form a consistent 8-10% of the cone photoreceptor population (Marc, 1982; Kolb and Lipetz, 1991).The S-cones are however, very few in the fovea center so causing a so-called S-cone blind spot (Williams et al., 1981) but they peak in number on the foveal slope at about 12% of the popu…