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The Eye

The Eye. Myopia & Hyperopia. Myopia (Shortsightedness). Myopia = Shortsightedness Can see nearby objects ( eg reading) Cannot see distant objects ( eg blackboard ) i.e. Short - sight Why?. Light rays focus in front of retina. Normal Eyeball. Myopic Eyeball. Causes. Genes

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The Eye

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  1. The Eye Myopia & Hyperopia

  2. Myopia (Shortsightedness) • Myopia = Shortsightedness • Can see nearby objects (eg reading) • Cannot see distant objects (eg blackboard) • i.e. Short - sight • Why? Light rays focus in front of retina

  3. Normal Eyeball

  4. Myopic Eyeball

  5. Causes • Genes • Lack of outdoor activity • Uncorrected refractive errors (eg. Wrong Correction) • Poor Eye Care • Too much near work • Computer • Reading • Television

  6. Complications • Retinal detachment • Retina separates from eye • Macular degeneration • Retina degenerates • Cataract • Opacity of lens • Glaucoma • Eyeball fluid pressure higher than normal

  7. Correction

  8. Correction • Corrected with a negative lens • Lenses can be from contact lenses / glasses • Other treatment: LASIK • More Severe Myopia = Thicker lens Glasses LASIK, correction with a laser Contact Lenses

  9. Hyperopia (Longsightedness) • Similar but not to be confused with Presbyopia • Able to see objects far away • Unable to see objects nearby • Why? • Light rays travelling into eye meet beyond the retina

  10. Normal Eye

  11. Hyperopic Eye

  12. Causes • Genetic (Children are able to outgrow this as they have flexible lenses) • Though to be Old Age (that’s actually presbyopia) • Injuries

  13. Correction • Glasses • Contact Lenses • Lens Positive

  14. C O N C L U S I O N

  15. References • Farsightedness . (2010, August 31). PubMed Health. Retrieved June 18, 2012, from http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002015/ • Myopia - Cause and Preventions. (n.d.). Raffles Medical Group. Retrieved June 18, 2012, from http://rafflesmedicalgroup.com.sg/health-articles/health-topics/myopia-causes-and-prevention.aspx

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