<prompt> Von Herick angle grade 3 of anterior chamber denotes?Wide open angleModerately open angleModerately narrow angleClosed angle  <response>: Ans. is b i.e., Moderately open ang Classification of anterior chamber angle based on van herick angleof the anterior chamber estimation method Angle grade Angle grade Cornea to angle ratio 4 Wide open angle incapabel of closure. Iris to cornea angular separation equals to 35-45 Anterior chamber depth shadow is equal to or greater than corneal thickness 3 Moderately open angle incapable of closure. Iris to corneal angular separation equals to 20-35deg Anterior chamber depth shadow is between 14 and 12 of the corneal thickness 2 Moderately narrow angle closure possible. Iris to corneal angular separation equals to 20deg Anterior chamber depth shadow is equal to 14 of the corneal thickness 1 Extremely narrow angle, closure chance high. Iris to corneal angular separation equals to 10deg Anterior chamber depth shadow is equal to less than 14 of the corneal thickness 0 Basically closed angle. Iris to corneal angular separation is 0 Anterior chamber depth shadow is nil or only a very narrow slit 