Interactions of chromatic and lens-induced defocus during visual control of eye growth in guinea pigs (Cavia porcellus).

Highlights: [•] The choroid of guinea pigs responds to imposed chromatic defocus. [•] The ERG b-wave reflects the differences in chromaticity of light used to imposed chromatic defocus. [•] Red light elicits an ERG with a poor signal-to-noise ratio in the guinea pig, suggesting poor sensitivity. [•] Blue light inhibits eye growth perhaps by enhancing the ON pathway. [•] Even when illuminances were matched by ERG, lenses were poorly compensated in red light, compared to blue light. [Copyright &y& Elsevier]