Made nearsightedness not consume a fuckton of memory.

Also it now adds glasses on preview pic.

code/modules/mob/living/carbon/human/life.dm

@@ -1227,8 +1227,14 @@
 				if(blinded)		blind.layer = 18
 				else			blind.layer = 0
 
-			if( disabilities & NEARSIGHTED && ((glasses && !glasses.prescription) || !glasses))
-				client.screen += global_hud.vimpaired
+			if(disabilities & NEARSIGHTED)	//this looks meh but saves a lot of memory by not requiring to add var/prescription
+				if(glasses)					//to every /obj/item
+					var/obj/item/clothing/glasses/G = glasses
+					if(!G.prescription)
+						client.screen += global_hud.vimpaired
+				else
+					client.screen += global_hud.vimpaired
+
 			if(eye_blurry)			client.screen += global_hud.blurry
 			if(druggy)				client.screen += global_hud.druggy
 

code/modules/mob/new_player/preferences_setup.dm

@@ -558,6 +558,9 @@ datum/preferences
 					else if(backbag == 3 || backbag == 4)
 						clothes_s.Blend(new /icon('icons/mob/back.dmi', "satchel"), ICON_OVERLAY)
 
+		if(disabilities & NEARSIGHTED)
+			clothes_s.Blend(new /icon('icons/mob/eyes.dmi', "glasses"), ICON_OVERLAY)
+
 		preview_icon.Blend(eyes_s, ICON_OVERLAY)
 		if(clothes_s)
 			preview_icon.Blend(clothes_s, ICON_OVERLAY)