PPT-Understanding Optical Lenses

Sphere SPH The term sphere is essentially the degree of correction needed to correct your near or farsightedness Terminology Cylinder CYL The number indicates the lens power needed to correct astigmatism in your eyes. gpliinfo brPage 3br Vertex Conversion Chart minus plus 387 400 425 400 425 450 425 450 475 450 475 500 475 500 525 500 525 562 512 550 587 537 575 612 562 600 650 575 625 675 600 650 700 625 675 737 650 700 762 662 725 800 687 750 825 712 775 850 725 1. Les gens ont des . étoiles qui ne sont pas les mêmes.. Pour les uns qui voyagent, elles sont des guides.. Pour les autres, elles ne sont rien que des petites lumières.. Pour d’autres, qui sont savants, elles sont des problèmes.. Real-time. Rendering of Physically Based Optical Effects in Theory and Practice. Yoshiharu . Gotanda. tri-Ace,. Inc.. . Camera. A camera is made from a lot of components. This course deals with components that make visual differences. Emmetropia. and the . Ametropias. Scott P. Drexler OD. University of Pittsburgh . School of Medicine . AKA: Shape is Power. Light is a Wave. The direction and quality of that wave is changed as the wave transfers from one medium to another. . How Do Your Eyes Help You See?. A lens is a curved surface, like a piece of glass or plastic.. Its curved shape makes light bend.. Lenses can make objects appear bigger or smaller to our eyes.. What is a lens?. Photo Terms. Focus is not an absolute. There is always a zone either side of the focused point that is acceptably sharp. The size of this zone will depend on how far away the subject is; the focal length and aperture of the lens; the size of the final picture; and what you regard as 'acceptable'. . Section 1 . Mirrors. A. . Light is necessary for eyes to see. 1. . Light waves spread in all directions from a light.. 2. . The brain interprets light waves as traveling in a straight line.. B. Plane mirror. 12.2 Refraction of Light. 12.3 Total Internal Reflection. 12.4 Refraction by Thin Lenses. 12.5 Ray Diagrams for Thin Converging Lenses. Chapter 12 Light. 12.4 Refraction by Thin Lenses. Learning Outcomes. light bends or refracts when it moves from one medium to another. the light bends because it changes speed. if light slows down it bends toward the normal. if light speeds up it bends away from the normal. COURSE DESCRIPTION . This course is designed to introduce students to the fundamentals of commercial photography in relation to seeing photographically, operating cameras, use of light, image capture, and processing digital images. Students will also learn the history of photography, legal and ethical issues related to the industry. Career exploration is also a part of this course. . and the . Ametropias. Scott P. Drexler OD. University of Pittsburgh . School of Medicine . AKA: Shape is Power. Light is a Wave. The direction and quality of that wave is changed as the wave transfers from one medium to another. Chris Woodruff. Ophthalmic Prism. Prism Effects in Periphery of Lens. Decentration. Major Reference Points. Correction of Vertical Prism Effect. Thickness Difference Across a Prism. Ophthalmic Prism / Prism Effects. The things we say... OD. - . Oculus Dexter. Right eye. OS. - . Oculus Sinister. Left eye. OU. - . Oculus . Uniter. Both Eyes. The things we say…. Myopia- Nearsighted. Hyperopia - Farsighted. Spherical. mTBI. Photophobia. Kia B. Eldred, OD, FAAO. Diplomate. in Low Vision. Staff Optometrist. Michael E. . DeBakey. VAMC. Mechanism of Photophobia. “Photophobia” is a misnomer – it means fear of the light. It denotes patients who have an abnormal sensitivity to light. “Photo-.