Figure 4. Similarity in scleral and total retinal thicknesses in KO and WT mice. A: The indicated layer thicknesses were measured with Longboard software on plastic sections stained with toluidine blue. Thicknesses are expressed in microns. The retinal thicknesses of the knockout (KO) and wild-type (WT) retinas were thinner in the IRBP KO mice than in the WT mice from P7 and later. Sample numbers at each age and strain are given on the figure. Appendix 2, panel B: The scleral thickness remained the same. Other individual layer thicknesses were the same. C: Choroid thickness. D: Inner nuclear layer (INL) thickness. * p<0.05; ** p<0.01.