convex

noun 0.759

lens

noun 0.698

concave

noun 0.689

convex function

noun 0.682

convexity

noun 0.647

convex set

noun 0.641

concavity

noun 0.605

lenticonus

noun 0.604

gravitational lens

noun 0.603

achromatic lens

noun 0.601

magnetic lens

noun 0.600

spherical mirror

noun 0.599

long lens

noun 0.587

lenticular

noun 0.583

fisheye lens

noun 0.582

convex hull

noun 0.581

immersion lens

noun 0.563

lente

noun 0.562

close-up lens

noun 0.561

circular cone

noun 0.560

wide-angle lens

noun 0.557

lensing

noun 0.550

conical

noun 0.548

prescription glasses

noun 0.543

dioptric

noun 0.542

eyeglass

noun 0.541

conic

noun 0.539

parabolic mirror

noun 0.538

gravitational lensing

noun 0.531

magnifying glass

noun 0.529

zoom lens

noun 0.529

refractor

noun 0.529

lenticularis

noun 0.528

keratoconus

noun 0.524

paraboloid

noun 0.524

reverse curve

noun 0.523

diopter

noun 0.518

converging

noun 0.517

parabolic reflector

noun 0.517

conic section

noun 0.514

optical glass

noun 0.513

conical flask

noun 0.512

refracting telescope

noun 0.512

optical flat

noun 0.509

lens flare

noun 0.509

magnifier

noun 0.509

hyperopia

noun 0.508

prism

noun 0.507

cone

noun 0.506

curvature

noun 0.505

compound eye

noun 0.503

convector

noun 0.503

retinoscope

noun 0.503

cornea

noun 0.503

hyperboloid

noun 0.503

compound microscope

noun 0.502

optician

noun 0.502

presbyopic

noun 0.501