Refractive Errors Eye Ppt
DIOPTER• Measures the divergence (spread) or convergence of light. Generated Tue, 06 Dec 2016 07:13:26 GMT by s_hp94 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.6/ Connection Surgical treatment Radial keratotomy Lamellar corneal refractive procedures Laser based procedures PRK LASIK LASEK C-LASIK E-LASIK 51. Miscellaneous corneal refractive procedures Nationwide Differential GPS (NDGPS) radiobeacons (real-time) ... | PowerPoint PPT presentation | free to view CHAPTER 1314 Reflection and Refraction of Light - Follow Snell's Law (with lenses). this content
Myopia A form of refractive error in which parallel rays of light entering the eye are focused in front of retina with accommodation being at rest. 32. CLINICAL TYPES SIMPLE HYPERMETROPIA PATHOLOGICAL FUNCTIONAL HYPEROPIA 55. Curvatural - abnormalities of curvature of lens as seen in lenticonus. Myopia• Special forms : nuclear sclerosis , keratoconus , spherophakia• Symptoms• Typically do not have “eye-strain”, “watering” of the eyes or headaches as often as hypermetropes do• Usually detected by the
Correction Of Refractive Errors Ppt
DISTANT VISION ERROR II: MYOPIA 39. …accommodation MYOPIA *Inof any help? MANIFEST HYPERMETROPIA Remaining part of total hypermetropia Correct by accommodation and convex lens Consists of facultative & absolute FACULTATIVE HYPERMETROPIA Corrected by patients accommodative effort ABSOLUTE HYPERMETROPIA byovernment medical... 5199views Refractive error byoptometry student 1603views Anomalies of refraction byGauri Shankar Shr... 11530views Share SlideShare Facebook Twitter LinkedIn Google+ Email Email sent successfully! Components The cornea The anterior chamber The iris and pupil The crystalline lens The retina 5.
Regular Astigmatism : Correctable by Spherocylindrical lenses Etiology : 1. Rays can be traced forward ... Refractive Errorsand management Ahmed AlMumtin, MD 2. Refractive Error In Children Ppt PATHOLOGICAL CAUSES OF MYOPIAMarfan’s Staphyloma 23.
Generated Tue, 06 Dec 2016 07:13:26 GMT by s_hp94 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.8/ Connection WHAT ARE WE GOING TO DO TODAY?• A little bit of optics• Refractive media of the eye• How the eye interacts with light• Refractive Errors 3. Emmetropia• Adequate correlation between axial length and refractive power• Parallel light rays fall on the retina (no accommodation) 11. Clipping is a handy way to collect important slides you want to go back to later.
VergencePrallel Beam Convergence Divergence 4. Human Eye Optics Physics PATHOLOGICAL HYPERMETROPIA Anomalies lie outside the limits of biological variation Acquired hypermetropia Decrease curvature of outer lens fibers in old age Cortical sclerosis Positional hypermetropia Refractive surgeries Astigmatic Keratotomy Photoastigmatic refractive Keratectomy [PRK] Relaxing incisions with compression sutures LASIK surgery 98. Anisometropia• Glasses : magnified or minified 2% per 1 D• Contact lens : change less than glasses• Tolerate aniseikonia ~ 5-8%• Symptoms : usually congenital and often asymptomatic• Treatment • anisometropia
Types Of Refractive Error Ppt
The Next few slides introduces a new term“DIOPTER”It will require some attentionIf you think its too difficult, don’t worry. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Correction Of Refractive Errors Ppt Correspondence of mount hardware and software model. Refractive Errors Of The Eye Pdf P =-1D 19.
Do you have PowerPoint slides to share? Generated Tue, 06 Dec 2016 07:13:26 GMT by s_hp94 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.10/ Connection Hard lenses:• Plastic polymer.• Most durable.• Rigid, therefore may scratch the cornea.• Not gas permeable corneal hypoxia corneal ulcers.• Cannot be worn continuously.• Difficult to get used to (because have a peek at these guys Diffraction Bending of light caused by edge of the aperture or rim of the lens. 20.
Clipping is a handy way to collect important slides you want to go back to later. Optics Of Eye Ppt Contact lenses Toric contact lenses Soft lenses [SL] Rigid gas permeable lenses [RGP] RGP do not conform to the asymmetry of corneal surface but replaces it totally and also provides PRESBYOPIA The physiologic loss of accommodation in the eyes in advancing age 76. Physiologic loss of accommodation in advancing age deposit of insoluble proteins in lens in advancing age-->elasticity
Recommended Project Management Fundamentals Gamification of Learning The Neuroscience of Learning Refractive errors Ahmed Almumtin Optics of human eye & refractive errors Sahithi Ganeshula Eyes - Refractive Errors.ppt Shama Refractive errors
You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides CONTACT LENS ADVANTAGES Cosmetically good Increased field of view Less magnification Elimination of aberrations & prismatic effect 74. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Refractive Power Of Human Eye Please try the request again.
Total hyper metropia Manifest hyper metropia Facultative hyper metropia Absolute hyper metropia Latent hyper metropia 62. DIOPTER• The Diopter also signifies the power of lens• The more the power the more the converging or diverging ability of the lens• Minus for Diverging lens (just like light rays)• Schechner Technion, Israel Hanumant Singh Woods Hole Oceanographic Institute Into Water Through Flat Window Prior Art ... | PowerPoint PPT presentation | free to view Refractive Surgery In the Military - http://johnlautner.net/refractive-error/refractive-errors-of-the-eye.html Lacquer Cracks Breaks in Bruch’s membrane 40.