Cataracts
- General information
- Opacity of the ocular lens
- Incidence increases with age
- May be caused by changes associated with aging ("senile" cataract); may be congenital; or may develop secondary to trauma, radiation, infection, certain drugs (corticosteroids)
- Assessment findings
- Blurred vision
- Progressive decrease in vision
- Glare in bright lights
- Pupil may develop milky-white appearance
- Diagnostic test: ophthalmoscopic exam confirms presence of cataract
- Nursing interventions: prepare client for cataract surgery.
Cataract Surgery
- General information
- Performed when client can no longer remain independent because of reduced vision
- Surgery performed on one eye at a time; usually in a same-day surgery unit
- Local anesthesia and intravenous sedation usually used
- Types
- Extracapsular extraction: lens capsule is excised and the lens is expressed; posterior capsule is left in place (may be used to support new artificial lens implant).
- Phacoemulsification: a type of extracapsular extraction; a hollow needle capable of ultrasonic vibration is inserted into lens, vibrations emulsify the lens, which is then aspirated.
- Intracapsular extraction: lens is totally removed within its capsule, may be delivered from eye by cryoextraction (lens is frozen with a metal probe and removed).
- Peripheral iridectomy may be performed at the time of surgery; small hole cut in iris to prevent development of secondary glaucoma
- Intraocular lens implant often performed at the time of surgery.
- Nursing interventions: preoperative (see also Perioperative Nursing)
- Assess vision in the unaffected eye since the affected eye will be patched post-op.
- Provide pre-op teaching regarding measures to prevent increased intraocular pressure post-op.
- Administer medications as ordered.
- Topical mydriatics and cycloplegics to dilate the pupil
- Topical antibiotics to prevent infection
- Acetazolamide (Diamox) and osmotic agents (oral glycerin or IV mannitol) to decrease intraocular pressure to provide a soft eyeball for surgery
- Nursing interventions: postoperative
- Reorient the client to surroundings.
- Provide safety measures: elevate side rails, provide call bell, assist with ambulation when fully recovered from anesthesia.
- Prevent increased intraocular pressure and stress on the suture line.
- Elevate head of bed 30°-40°.
- Have client lie on back or unaffected side.
- Avoid having client cough, sneeze, bend over, or move head too rapidly.
- Treat nausea with antiemetics as ordered to prevent vomiting.
- Give stool softeners as ordered to prevent straining.
- Observe for and report signs of increased intraocular pressure: severe eye pain, restlessness, increased pulse.
- Protect eye from injury.
- Dressings are usually removed the day after surgery.
- Eyeglasses or eye shield used during the day.
- Always use eye shield during the night.
- Administer medications as ordered.
- Topical mydriatics and cycloplegics to decrease spasm of ciliary body and relieve pain
- Topical antibiotics and corticosteroids
- Mild analgesics as needed
- Provide client teaching and discharge planning concerning
- Technique of eyedrop administration
- Use of eye shield at night
- No bending, stooping, or lifting
- Report signs or symptoms of complications immediately to physician: severe eye pain, decreased vision, excessive drainage, swelling of eyelid.
- Cataract glasses/contact lenses
- if a lens implant has not been performed, the client will need glasses or contact lenses.
- temporary glasses are worn for 1-4 weeks, then permanent glasses fitted.
- cataract glasses magnify objects by 1/3 and distort peripheral vision; have client practice manual coordination with assistance until new spatial relationships become familiar; have client practice walking, using stairs, reaching for articles.
- contact lenses cause less distortion of vision; prescribed at one month.
Monday, May 19, 2008
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eye disorder
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This entry was posted on Monday, May 19, 2008
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