PPT-Light and Lenses:

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. . 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?. Meet the microbes!. Escherichia coli . prokaryote. divides every 20-30 min.. (lab uses nonpathogenic strain) . Saccharomyces cerevisiae. eukaryote. divides every ~90 min. . Microscopes are required to see individual microorganisms. December 4. th. . REVIEW. What do you remember. ?. December 4. th. 2015 page 111. DO: I . will be able to explain the nature of waves, their behaviors and characteristics as they are manipulated by mirrors and lenses. A report on current myopia progression control developments with contact lenses.. introduction. Two leading researchers who are also practitioners in the field of controlling short-sightedness review the evidence available from various clinical studies which have assessed how effective Overnight Vision Correction (OVC) is in slowing down or halting the progression short-sightedness in children. They highlight the positive conclusions reached by the studies and provide their views on the clinical reasons why overnight . 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. Lenses. A transparent object used to change the path of light. Examples: . Human eye. Eye glasses. Camera. Microscope. Telescope. Reading stones used by monks, nuns, and scholars ~1000 C.E.. Lenses . 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. Mirrors. Recall that your eyes gather light reflected off of objects . This allows you to see the objects. Light can reflect more than once. Light bouncing off of you can then bounce off of a mirror. Lenses. A . light ray bends as it enters glass and bends again as it leaves. . Light . passing through glass of a certain shape can form an image that appears larger, smaller, closer, or farther than the object being viewed. . Section 1: Objectives. Use. ray diagrams to show how light is reflected or refracted.. . Compare . plane mirrors, concave mirrors, and convex mirrors.. . Use. ray diagrams to show how mirrors form images.. 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. . Matthew Mahek, OD. TTUHSC Department of Ophthalmology and Visual Sciences . Financial disclosures . . Objectives. Described a variety of uses for contact lenses. Discuss the complications associated with contact lenses. 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. 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..