Blurred vision

Description

Mind Map on Blurred vision, created by Fatima Alkhateeb on 11/10/2018.
Fatima Alkhateeb
Mind Map by Fatima Alkhateeb, updated more than 1 year ago
Fatima Alkhateeb
Created by Fatima Alkhateeb about 4 years ago
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Resource summary

Blurred vision
  1. Anatomy
    1. Layers
      1. Fibrous
        1. Sclera
          1. Cornea
          2. Vascular
            1. Choroid
              1. Ciliary body
                1. Iris
                2. Nervous
                  1. Retina
              2. Histology
                1. Physiology of vision
                  1. Light hits the retina
                    1. Rods are turned off
                      1. Turn bipolar cells on
                        1. Turn ganglionic cells on
                          1. On center
                            1. Off center
                              1. AMPA
                              2. mGluR6
                        2. Phototransduction cascade
                          1. Light hits rhodopsin on rods
                            1. Changes cis to trans retinal
                              1. Transducin breaks up from rhodopsin
                                1. PDE is activated to decrease cGMP
                                  1. closure of Na channels -> hyper polarization
                        3. Glaucoma
                          1. Increased IOP
                            1. Causes
                              1. Excessive aqueous production
                                1. Inadequate aqueous drainage
                                  1. Certain medications (STEROIDS)
                                    1. Eye trauma
                                2. Symptoms
                                  1. Blurred vision
                                    1. Headache
                                      1. Vision problems
                                      2. Causes
                                        1. Cataract
                                          1. Refractive errors
                                            1. Myopia (short sightedness)
                                              1. Hypermetropia (long sightedness)
                                  2. Types
                                    1. Open angle
                                      1. Drainage system blocked
                                        1. Gradual increased IOP >21 mmHg
                                          1. Optic nerve damage
                                        2. Initial loss of peripheral vision then central vision will be affected
                                        3. Closed angle
                                          1. Lens pushing against iris
                                            1. Rapid increased IOP
                                            2. Abrupt onset of redness, eye pain, blurry vision
                                        4. Eye tests
                                          1. Visual acuity
                                            1. Color vision
                                              1. eye's ability to see an in-focus image at a certain distance
                                              2. Refraction assessment
                                                1. Fundoscopy
                                                  1. Tonometry
                                                    1. puff of air to estimate the pressure in the eye.
                                                      1. 11-21 mmHg
                                                    2. evaluate the back of your eye, including the retina, the optic disk and the underlying layer of blood vessels that nourish the retina
                                                    3. Light waves are bent as they pass through the cornea.
                                                  2. Management
                                                    1. Treatment goals
                                                      1. Preserve vision
                                                        1. Decrease IOP
                                                        2. Ways to treat
                                                          1. Reduced aqueous humor production
                                                            1. Increase aqueous humor drainage
                                                              1. Prostaglandins
                                                                1. Bimatoprost
                                                                2. Parasympethatic
                                                                  1. Pilocarpine
                                                                3. Beta blockers
                                                                  1. Timolol
                                                                  2. Alpha 2 agonist
                                                                    1. Apraclonidine
                                                                    2. CA inhibitors
                                                                      1. Acetazolamide
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