Judged: two independent readers; copy check clear.
S and M
S and M In this source, "S and M" refers to two retinal cone classes identified by their opsins: S-cones and M/L-cones.
In this source, "S and M" refers to two retinal cone classes identified by their opsins: S-cones and M/L-cones. These are light-sensitive cone cells whose degeneration patterns were examined in a mouse model of retinitis pigmentosa.