Suggested reading:

Oxidation Causes Melanin Fluorescence

Peter Kayatz; Gabriele Thumann; Thomas T. Luther; Jens F. Jordan; Karl Ulrich Bartz–Schmidt; Peter J. Esser; Ulrich Schraermeyer, Retina | January 2001.

Its lipofuscin absorbs light at 470 nm and emit at 540 nm.

I agree with Neeraj Tewari and Agnishwar Girigoswami

Neeraj Tewari I have already read this article and had a conversation with two of the authors. The article does not conclude the specific fluorophore or the link between lipofuscin and fluorescence, and the authors could not answer my question either.

Agnishwar Girigoswami thank you.