PPT-Retina

Mohamed AZaher MSc Anatomy Gross anatomy Microscopic anatomy Physiology Rods sense brightness   Cones sense color To brain The retina in the back of your eye has cells that are sensitive to light They connect directly to your brain. Jean Escalante. Kristin . Filkins. Erika Garcia.  . SPE-516 Structure . and Function of the Visual System. What is Retinopathy of Prematurity?. When an infant is born early or not completely developed their eyes may be lacking in development as well. . 2. 3. 4. 5. 6. Neurons as Filters. 7. 8. 9. 10. Local Circuits in V1:. Selectivity is generated by specific connections. stimulus. Orientation selective. cortical simple cell. LGN. V1. Retina. 11. 12. Temporal filtering . – visual response slower than input signal. . 2. Spatial filtering . – local signals are combined across space to varying degrees.. . . 3. Light adaptation . – retina modifies responsiveness depending on average light level.. Dr.Bakhtiar. . Qadr. . Jaf. بسم الله الرحمن الرحيم. OBJECTIVES. 1-SHORTLY DISCUSS THE ANATOMY & PHYSIOLOGY OF THE RETINA.. SHORTLY DISCUSS COMMON VISION THREATENING RETINAL DISEASES.. New Developments in RWD. Background. RWD is constantly evolving.. Designers continue to refine RWD theory and practice.. New tools are constantly created.. Background. Three areas of importance to designers:. Prematurity. Kathy . Seabridge. , Angela Cook, Sara Escoe. Stages of Retinopathy of Prematurity. Retinopathy of Prematurity. Normal Eye. What they see…. Stage 4 Retinopathy of Prematurity. Once the retina has partially detached, a shadow or curtain will come from the top or side of the eye until all vision is lost. During stage 5, the retina will completely detach and complete vision loss can be gradual or instantaneous.. Indera penglihatan 1 & 2. Matrissya Hermita. RESEPTOR dan PENGINDERAAN. Reseptor : struktur yang menerima stimulus/rangsangan.. Terbagi atas :. Eksteroreseptor. Reseptor yang menerima rangsang/impuls dari luar tubuh. . DIFFERENT INVESTIGATION IN SPECIALTY CLINIC. DIFFERENT INVESTIGATION IN SPECIALTY CLINIC. Refraction . Auto Refractor Machine -Rate -2, 00,000. Topcon uses . : Check correct power, Correct Axis, Auto K –reading, Correct IPD. CATARACT. Lens . of eye . becomes cloudy. Frequently . occurs in people over . 70. P. ainful. , gradual blurring . of vision. Pupil . turns . milky white. Rx . – surgical removal of . the . lens. COLOR BLINDNESS. Dr. . Rupa. . Mukhopadhyay. . WHAT IS VISION ??.  . . primary . sense. . one of their main ways of perceiving the world around . them. . The mammalian eye, like all other eyes is a device for collecting and focusing light . Figure 15.1 The eye and accessory structures. Surface anatomy of the right eye Lateral view; some structures shown in sagittal section Figure 15.2 The lacrimal apparatus. Figure 15.3 Extrinsic eye muscles. . etc.venues. . St. . Paul’s. E. valuation. attendance. Who Attended Retina Day?. ~102 people attended Retina Day. 61 evaluation forms returned. What . eye conditions were people . interested . in?. Dr. . Vincent Yau-Wing Lee. Asia-Pacific . Vitreo. -retina Society. Types of Retinal . detachment. 1. . Rhegmatogenous. . (RRD). . accumulation of . subretinal. fluid via a retinal break. Types of Retinal detachment. Retina SpecialistsThe Foundation continued next pageCommitted to improving the quality of life of all people with retinal disease. RETINA HEALTH SERIES WHAT IS THE RETINA? Symptoms and Causes: edema r