Example image of eyePlorer eyePlorer map for 'Aspheric lens': Cylinder (geometry) Lens (optics) Sphere Photography Optical aberration Simple lens Spherical aberration Normal lens Wide-angle lens Glasses Camera Laser diode Optical fiber Fabrication and testing of optical components Missile guidance Rear-projection television Telescope Diamond turning Lathe Infrared Ion beam Jet (fluid) CR-39 Lapidary Laser ablation Astigmatism (eye) Bifocals Trifocal lenses Corrective lens Optical power Presbyopia Progressive lens Aphakia Hyperopia Intraocular lens Myopia Retina Dioptre Blind spot Scotoma 984 Ibn Sahl Refraction Snell's law Constantijn Huygens René Descartes Gotland Visby lenses Burning glass Old Style and New Style dates