If it is true that...

Bright light isn't harmful to the retina if the retina isn't sensitized

Then it must be true that...

Retinal injury is caused by ordinary light when the eyes are sensitized by melatonin, prolactin, and polyunsaturated fats

If it is true that...

Bright light isn't harmful to the retina if the retina isn't sensitized

Then it must be true that...

Bright light contributes to retinal damage in babies