This trait lowers your base Perception by 1 point when attempting to qualify for perks. However, when wearing glasses, Perception is raised by 2.
Notes[]
In Mitchell's house, where the doctor asks the player their name and lets them adjust appearance options, there is a pair of eyeglasses on the counter over his right shoulder (behind the medical bed).
Biker goggles are not affected by this perk, even though they have attachments that appear to have glasses and lenses which cover the player's eyes.
Behind the scenes[]
"Four Eyes" is a common derogatory term for anyone wearing glasses.