. ▁ ▁Sub oc ular ▁scales , ▁or ▁sub oc ular s , ▁are ▁those ▁lying ▁directly ▁below ▁and ▁in ▁contact ▁with ▁the ▁eye . ▁ ▁Collect ively ▁these ▁scales ▁are ▁referred ▁to ▁as ▁circum orb ital ▁scales , ▁circum or bit als , ▁or ▁a ▁circum orb ital ▁ring . ▁ ▁Occ asion ally , ▁the ▁term ▁oc ular ▁scale ▁is ▁used ▁without ▁a ▁prefix , ▁in ▁which ▁case ▁it ▁specifically ▁refers ▁to ▁the ▁br ille , ▁also ▁known ▁as ▁the ▁spect acle ▁or ▁e y ec ap . ▁This ▁is ▁a ▁transparent ▁scale ▁that ▁covers ▁and ▁protect s ▁the ▁eye . ▁It ▁is ▁formed ▁in ▁emb ry onic ▁sn akes ▁when ▁the ▁transparent ▁upper ▁and ▁lower ▁e y el ids ▁f use ▁together . ▁Once ▁h atch ed , ▁a ▁s nake ▁does ▁not ▁possess ▁e y el ids ▁and ▁the ▁br ille ▁car ries ▁out ▁some ▁of ▁these ▁functions . ▁ ▁See ▁also ▁ ▁Br ille ▁ ▁O cular ▁( disambiguation ) ▁ ▁S nake ▁scales ▁ ▁An atom ical ▁terms ▁of ▁location ▁ ▁References ▁ ▁Category : S nake ▁scales <0x0A> </s> ▁Pseud oph il aut us ▁nem us , ▁known ▁as ▁Wh ist ling ▁S hr ub ▁F rog , ▁is ▁a ▁species ▁of ▁fro gs ▁in ▁the ▁family ▁Rh ac op hor idae . ▁ ▁It ▁is ▁en demic ▁to ▁Sri ▁L anka . ▁ ▁Its ▁natural ▁habitat ▁is ▁subt rop ical ▁or ▁tropical ▁mo ist ▁low land ▁for ests . ▁It ▁is ▁threatened ▁by ▁habitat ▁loss