Exam 2 Sensory Flashcards
Blepharitis
Inflammation of the eyelid. Can be seen with conjunctivitis or other infections.
Causes itching and occasionally red and burning eyes.
Crusting, scales and exudate can be seen.
Types of blepharitis
Two main types: bacterial and seborrheic
Treatment for blepharitis
Keep it clean
Entropion overview
Inward turning of the eyelid, most commonly the lower lid. Scratches the cornea.
Causes: trauma, muscle spasm, or inflammation
Main concern is corneal abrasion.
Entropion treatment
Treatment: inform healthcare provider. Eye drops will be used for temp releif. Need to see an ophthalmologist.
Ectropion
Outward turning or drooping of the eyelid, most usually the lower lid.
Usually caused by aging or strokes.
Leads to corneal drying and ulceration because the eye dries out.
Hordeolum
Sty, usually of staph or strep. Arises from glands in the lid becoming infected, and the pores which allow the glandular material to escape becoming clogged.
Treat with warm compresses and antibiotic ointment to keep clean. Warm compress increases circulation. Eye drops can be helpful for antibiotic measures.
Keratoconjunctivitis sicca
or Dry Eye Syndrome
Three different processes the body uses to make tears. If any of the three processes are messed up, there will be dry eye problems.
Diagnostic method for keratoconjunctivitis sicca
litmus paper in the eye to see how much your eye tears up.
Due to an alteration in tear production, composition or tear distribution.
Causes of keratoconjunctivitis sicca
medications, autoimmune diseases such as RA, lupus or Sjogrens, radiation or chemical burns or nerve damage.
Signs and symptoms of keratoconjunctivitis
Eye pain, burning, itching, photophobia, mucus and corneal changes.
Treatment for keratoconjunctivitis
depends on severity: Eye drops or ointments. Restasis-immunosuppressant that works in the area around the eye to decrease inflammatory response. Lacralube: highly refined petroleum jelly… not helpful by way of eye sight.
Subconjunctival Hemorrhage
Usually due to coughing, sneezing or straining.
It may be a complication of hypertension or a clotting problem.
Usually resolves without treatment in one to two weeks.
Conjunctivitis
Inflammation or infection of the conjunctiva. Highly contagious. Can be due to many different things.
s/s of conjunctivitis
itching, burning, edema, excessive tearing and engorgement of blood vessels.
Document and treat underlying cause.
Treatment of conjunctivitis
educate on hand hygeine. Don’t share towels, or keep makeup that you used before the infections. Rx for eyedrops or ointments. Shouldn’t be experiencing photophobia,
Note drainage:
conjunctivitis drainage according to type of infection
viral=clear, bacterial=purulent
Trachoma
You’ll see this on medical missions
Leading cause of preventable blindness, especially in third world countries.
Chronic, bilateral conjunctival infection by Chlamydia trachomatis
Edema, entropion (things curl in and scar the cornea), conjunctivitis, tearing, photophobia, corneal scarring.
Treated with antibiotics. Handwashing is important. Educate people to complete their round of antibiotics
Cataracts
An opacity or cloudiness of the lens that interferes with the focusing of light, and a clear image forming on the retina, resulting in blurry or distorted vision
Cataracts: Causes
Age related: the most common, some formation is expected over the age of 70.
Trauma: blunt trauma to head or eye, foreign bodies, or radiation exposure.
Toxic exposure to chemicals and pollutants, sunlight, or medications.
Associated with other diseases (diabetes).
Complications of other eye diseases.
Key features of cararacts
NO PAIN or REDNESS is associated with cataract formation.
Blurred vision, glare from sun or headlights
Decreased color perception
color of pills can get people’s medications mixed up
Diplopia and reduced visual acuity
Absence of red reflex
White appearing pupil and eventual blindness.
Cataract Treatment
Surgery, with lens removal and implantation is the only “cure” for cataracts.
Pre op evaluation and pre and post op education is key to a successful experience.
If on flomax, you need to stop the drug before surgery
Cataract: Education
Regarded as one of the safest and most successful of all surgeries.
A tiny incision is made and an instrument is then used to disintegrate the clouded lens into tiny pieces which are then suctioned away.
A new artificial lens is inserted
Cataract Post op Care
Call the doctor for: RSVP
R: Increased redness.
S: Extreme sensitivity to light.
V: Decreased vision: especially flashes of light.
P: Severe pain, purulent drainage (or bleeding).
Patient Instructions post op for cataracts
Avoid activities that increase intraocular pressure: sneezing, coughing, bending from the waist, vomiting, intercourse, vomiting or carrying more than 15 lbs. People don’t think about this, because they do it everyday.
Instruct Pt. on proper application of eye drops.
They may gently clean the eye with water on a cotton ball, but do not get water in the eye.
Arrange for someone to drive them home and assist with care for a few days.
Avoid NSAIDS or anything that will incrase bleeding.
Sleep on opposite side of surgery.
Wear eye patch when sleeping for the first week to a month depending on Doctor’s instruction.
Wear sunglasses when outside.
Wash hands well before touching the eyes.
Bring all eye drops to follow up appointments.
Do not use make up or lotions around the eye until advised to do so.
Sleep on their back or turn to non-operative side for 3 to 4 weeks.
Glaucoma
One of the leading causes of preventable blindness in the US. Interior fluid oxygenates the area of the eye.
Progressive degeneration of optic nerve fibers associated with an increase in intra-ocular pressure do to an imbalance between production and outflow of aqueous humor or an obstruction of outflow.
See table 49-2 on page 1291
Glaucoma: Two Major Types
Primary open angle glaucoma
Acute closed angle glaucoma
Primary open angle glaucoma
It is usually bilateral and is due to reduced outflow of aqueous humor. Usually asymptomatic in early stages. Blind spot progress to blindness if untreated. 10% of people over 80 have this.
Acute closed angle glaucoma
A medical EMERGENCY. Sudden onset with impaired vision, severe eye pain, N/V. Can be caused by trauma, iritis, or uvitis. Suddenly development of pressure above 50 or 70.
Open-Angle Glaucoma: Symptoms
Increased IOP
Diminished accommodation
Blind spots/decreased peripheral vision
Halos around light
Dull morning headache due to vision changes
See box 49-3 on page 1290 for the progression of glaucoma.
Glaucoma:Assessment
Tonometry
Opthalmoscopic exam
Tonography
Tonometry
measures intraocular pressure.
Opthalmoscopic exam
cupping and atrophy of optic disc.
Tonography
measures outflow of aqueous humor.
Glaucoma: Non-surgical Treatment
Drug therapy: Works to decrease intraocular pressure by either constricting the pupil (ciliary muscle) or by reducing the production or increasing the reabsorption of aqueous humor.
reduce fluid production, or
increase drainage
Glaucoma Drug Therapy
Pupillary Constriction:
Miotics:
IProstaglandin agonists:
Aqueous Humor Inhibitors:
Beta blockers: timolol (Timoptic) or levobunolol (Betagan)
Carbonic anhydrase inhibitors:
acetazolamide (Diamox) and
methoazolamide (Neptazane).
Miotics
sopto Carpine, Pilocar, Miostat–These cause blurred vision for 1 to 2 hrs.
Iprostaglandin agonists
latanoprost (Xalatan), travoprost (Travatan), bimatoprost (Lumigan) and unoprostone (Rescula).
Glaucoma: Surgical Treatment
Laser Surgery: trabeculoplasty, the trabecular meshwork is burned and removes part of the trabecular network thus improving outflow.
Hypertensive Retinopathy
Hypertension leads to narrowing of the blood vessels, leakage of blood and exudate, ischemic areas and retinal detachment.
May have headaches and vertigo.
Damage rated from 1-4 (4 is the greatest)
Diabetic Retinopathy
Damage to the blood vessels of the retina that worsens as blood glucose worsens.
Causes areas of bleeding/scarring that affect vision.
Leading cause of visual disability and blindness among adults in the United States.
Diabetic Retinopathy: Two Types
Background
Proliferative
Background diabetic retinopathy
Microaneurysms and vessel death cause leakage of blood and scarring, retinal ischemia and macular edema. Capillaries can no longer carry oxygen and nutrients.
Proliferative diabetic retinopathy
In response to ischemia new fragile blood vessels grow. The new vessel leak and they grow onto the retina and iris. Can lead to retinal detachment.
Diabetic Retinopathy: Treatment
Laser Photocoagulation: A high energy laser beam burns and creates small scars, sealing leaks and aneurysms and destroying new vessel networks.
Vitrectomy: Done to remove large unresolved hemorrhage or scar tissue. Fluid and tissue volume is replaced using a saline solution. Used in extreme cases due to increased risk of blindness.
Macular Degeneration
Goal is to keep current vision as much as you can.
Two types: Wet and Dry