Yes, but if an employee wears corrective glasses/goggles or other personal protective equipment, the employer must ensure that such equipment is worn in a manner that does not interfere with the seal of the facepiece to the face of the user. Kits are available from respirator manufacturers that allow the mounting of prescription lenses inside the respirator.
As long as OSHA does not prohibit it, contact lenses can be worn with any type of respirator, but their use is not recommended in dusty atmospheres if wearing a half-mask facepiece.