If it is true that...

Melatonin, tryptophan, fish oils, St. John's wort, and omega -3 oils increase the risk of retinal light damage and macular degeneration

and

Serotonin uptake inhibiting antidepressants are suspected to cause retinal light damage and macular degeneration

Then it must be true that...

Degeneration of the retina is the main cause of blindness in old people

If it is true that...

Serotonin uptake inhibiting antidepressants are suspected to cause retinal light damage and macular degeneration

Then it must be true that...

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