Optician Practical Exam 2023 with 100% correct answers

a lens focal length may be altered by? - correct answer changing the curvature of one surface what controls the amount of light that enters the eye? - correct answer Iris lights changing direction as it passes from one medium to another is called what? - correct answer refraction meniscus, equiconcave and flat concave are all, what? - correct answer minus lenses what term is used to describe the eyes tendency to TURN from its normal position? - correct answer phoria refractive condition where light focuses directly ON the retina...? - correct answer emmetriopia one convex and one concave surface is known as... - correct answer a meniscus lens best lens treatment to reduce water and road glare? - correct answer polarized establishes commercial and industry standards.. - correct answer ANSI hard resin used in plastic - correct answer cr39 multifocals are measured to the... - correct answer lower edge of lens not frame corneas index of refraction - correct answer 1.37 lens characteristic that corrects astigmatism is called.... - correct answer cylinder power progressive marks are ______ mm apart - correct answer 34 mm what prism could help EXOtropia? - correct answer base in prism what prism could help ESOtropia? - correct answer base out prism what happens if you move a PLUS lens CLOSER to the eye? - correct answer loses perceived power what happens if you move a PLUS lens AWAY from the eye? - correct answer gains perceived power wha