Its neighbor closest to R3 is R4 and the other is R6.The cell between R1 and R3 is labeled as R2.Within om-To label the PRQuantification of Rhodopsin LevelsEffect of tissue heterogeneity on quantification.the inhomogeneous structure of the retinal tissue, different parts ofthe retina have slight variations of refractive index, which result inDue tolight scattering that can lead to quantification a