Fallout: New Vegas Traits

General information
Traits modify different aspects of gameplay, including (but not limited to): Primary statistics, derived statistics and skills. With the exception of Wild Wasteland, traits yield one or more benefits, plus an equal number of (offsetting) detriments.

Traits are optional; the player may select up to two (or none at all) during character creation.

Fast Shot and Trigger Discipline should not be selected together or they will counter-act each other and have no effect.

Note that the Four Eyes trait description during selection is somewhat deceptive as it actually reduces your base perception by 1 and adds a +2 perception status effect when eye-wear is equipped. This is important if you want to select certain perks with perception requirements (such as Sniper or Better Criticals) as they may be unavailable unless your base perception is increased by an additional point to negate the loss.

It should also be noted that because most eye-wear comes with a +1 perception modifier the Four Eyes trait only hinders since in the end you will only be getting +1 from your eye wear to mitigate the perception loss.