CblK26 mutant eye mosaics display rough eyes and are larger compared to wild-type. They appear overgrown and exhibit larger ommatidia. This overgrown phenotype is visible in eye-antennal imaginal discs from the 3rd instar onwards.
CblK26 mutants block apoptosis and cause over-recruitment of all cell types in the eye. CblK26 mutant ommatidium contains on average 11.44 R cells compared to eight in wild-type ommatidia and about three primary pigment cells instead of two in wild-type. The total numbers of secondary and tertiary pigment cells has increased from nine in wild-type to an average of fourteen per CblK26 ommatidium. CblK26 mutants exhibit 4.5 R7 cells per mutant ommatidium compared to one cell in wild-type.