Read the Elife Digest of Rodrigo’s paper, “Compensatory growth renders Tcf7l1a dispensable for eye formation despite its requirement in eye field specification” here:
https://elifesciences.org/digests/40093/eye-size-is-pre-programmed-in-zebrafish
or watch this great video for a simple explanation of Rod’s findings.
Sizing the eyes – a study of the mechanisms by which the developing eye copes with deleterious genetic mutations