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Alright, now you might try reformulating the position that there is an effect a little more sensibly.
To help you along, regular visible light has long been suspected to be damaging to eyes. In the '80s the focus was mainly on UV, but since the '90s it's been understood that regular visible violet and blue light may have similarly deleterious effects. A screen then would be a confounding factor in this hypothesis, slightly increasing the risk of long-term negative effects like cataracts, for example.
The main reason it seems implausible for blue light emitted by displays to actually have such an effect is the sheer lack of intensity compared to the sun. As far as I know there's presently no evidence that prolonged low-intensity exposure actually does anything harmful to the eye.
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