The impairment to my eyesight was caused by reading in the dark.
Advanced English Dictionary
+noun [U, C] (technical) the state of having a physical or mental condition which means that part of your body or brain does not work correctly; a particular condition of this sort: impairment of the functions of the kidney + visual impairments
Random quote: The truth you believe and cling to makes you unavailable to hear anything new.: Pema Chodron