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