Turns out watching porn can make you go blind after all.

The new sex study shows that watching hard-core erotic films reduces blood flow to the visual cortex of healthy, heterosexual women, blurring their eyesight.

Dr. Gert Holstege, a uroneurologist for the University of Groningen Medical Centre in the Netherlands, said the results suggest that when watching naughty flicks, a sexual arousal takes precedence over anxiety in a women's eyes.

“If you look, for example, at your computer and you have to write something or whatever, then you have to look specifically and carefully at what you're doing because if you don't, it means you make mistakes,” Holstege told LiveScience.com.

“But the moment you are watching explicit sexual movies, that's not necessary, because you know exactly what's going on. It's not important that the door is green or yellow.”

A dozen research participants, all on hormonal birth control, were showed three movies: a documentary on Caribbean marine life, a soft-core porn flick and a hard-core one.

Using PET scans to peek inside the women's brains, researchers noted a drop in blood flow to the visual cortex when the participants were watching the hard-core movies, Holstege said.

The research results were published this month in the Journal of Sexual Medicine.

Read more: nydailynews.com

Than goodness it only affects women. LOL.