Ophthalmic pt Services and Education 8% Flashcards
*What are the 2 main causes of color deficiency?
Inherited (passed by the mother to male child)
Aquired(due to ON or Ret disease)
*Eye lid turns inward causing eyelashes to rub against K
Entropion
An inflammatory and bacterial condition of the lid and lid margin
Blepharitis
Blepharitis is treated with
Mild Abx and steroid oint, lid hygiene, lid scrub, and baby shampoo scrubs, warm compresses. Chronic condition (don’t sure it’s just manage it)
Hordeolum and chalazion are mostly cause by what
Staph aureus
Infection or inflammation of the sebaceous gland at base of lashes
Hordeolum
*Infection or inflammation of deep meibomian glands within the eyelids-develops into a hard mass
Chalazion
*Pt has high blood cholesterol causing cholesterol deposits to form around the eyes
Xanthalasma
A failure of the levator muscle
Ptosis
What are the types of ptosis?
Congenital or aquired
*Pt can’t close eyelids all the way. Caused by Bell’s Palsy and other causes
Lagophthalmos
Upper eyelid skin has become very thin and droopy. Causes overhanging of normally positioned eyelid
Dermatochalasis
Can happen in the lid margin. Most frequent site to find this. Will typically not grow lashes.
(BCC) Basil Cell Cancer(CA)
Opacification in the crystalline lens. Can form in any layer of the lens.
Cataracts
What are some causes of cataracts?
Trauma, congenital, due to use of certain medications like steroids, or age related.
Cataract formed in the nucleus
White mature
*Cataracts: opacification just below the capsular bag. Tend to happen due to steroid use.
PSC (posterior subcapsular cat)
Cataracts: frequently grows in spokes. Can cause increasing lenticular astigmatism if more dense in one meridian than another.
Cortical cataracts
What are the 3 primary types of GLC?
OAG, pupillary block, secondary glaucoma
*What is the most common type of glaucoma
Open angle
GLC: Fluid flows fine in the eye but when tries to escape through trabecular meshwork it doesn’t flow out well. Fluid flow is decreased due to narrowed opening on the TM.
OAG
Glc: angle structures are narrowed. Aqueous flow has difficulty circulating. Iris bows forward obstructing outflow through the TM
Pupillary block
Glc: also known as narrow angle glc
Pupillary block
Glc: eye is crowded because pt hyperopic and has a small eye or perhaps has a dense CAT that has crowded out the eye.
Pupillary block (narrow angle)
Glc: TM is blocked by red blood cells, scarring/sunechiae, debri, pigment, hyphema
Secondary Glc
A comparison of the size of the cup(white circle in the middle) compared to the disc(size of the whole optic nerve)
Cup to disc ratio
C/D
(Ex. If cup is 20% size of disc you would say it is .2 cup to disc ratio)
The larger the number the sicker the ON is.
What normal range of C/D?
Suspicious range?
Glaucoma?
.1-.4
.5-.7
.8 and above
2nd most common form of GLC
Narrow angle (NAG or closed angle glc)
*Glc that presents through sudden attacks of pain caused by increase iop. Treated with LPI,
Narrow angle
Procedure that puts a hole in the iris with a laser creating an overflow channel.
LPI
(Laser peripheral iridotomy)
Glc: can be apparent when a child has very large eyes, one eye larger than the other, causes blue tinted sclera
Congenital
Pain, Constant tearing, photophobia, and blepharospasms are sign and symptoms of…
Congenital glc
Glc: Abnormal blood vessel growth in the iris. Very difficult glc to treat.
Neovascular glc (rubiosis)
*Vitreous detached from the retina.
PVD(floaters)
What are the worries with PVD?
That it’s gonna pull a hole in the retina which can progress into a RD.
New onset of floaters or flashing lights needs….
Prompt ret exam within 24 hours
90% of AMD is _______
10% of AMD is _______
Dry(no leaky blood vessel)
Wet(has leaky blood vessels)
Blood is toxic to_____. When they are expose to blood they ____
Retinal photo receptors
Die
Profound vision loss, geographic atrophy, and scarring of the macula are symptoms of what AMD?
Wet AMD
Which AMD is characterized by Pt tending to have a gradual decrease in va
Dry AMD
Yellow spots on retinal that are signs of dry AMD
Drusen
Central VF test given to pt to monitor and see if any change in retina between appointments for AMD pts
Amsler
Distortion in smaller grid, present with wet AMD. Can also be missing areas or double lines.
Metamorphopsia
Membrane that grows over the macula. Can cause distorted vision and decreased va. Treated with membrane peel when va dropped to 20/50 or worse.
Cellophane maculopathy, epiretinal membrane (ERM), or macular pucker
What are the 2 types of cerebral vascular accidents?
Ischemic stroke and hemorrhagic stroke
Stroke that happens when an emboli or blood clot cuts off oxygen to a given part of the brain. Warning is sudden temporary va loss and visual field loss (CRAO, CRAVO, BRAO, BRVO)
Ischemic
Stroke describes as bleeding in the brain
Hemorrhagic
Blood is ____to the neuro cells in the brain. So they ____ when exposed to blood.
Toxic
Die
An example of interaction between 2 organ systems(circulatory and neurologic system)
Cerebral vascular accident
*Inflammatory or immunologic disorder effecting circulatory system. Dreaded conditions because can cause permanent va loss and/or death. Can cause ON damage from reduced blood supply, diplopia, CRAO, usually occurs 60 yo +
Giant cell arteritis (temporal arteritis)
What is the protocol and tx of Giant cell arteritis?
Urgent blood testing (set rate) and/or temporal artery biopsy. Treated with corticosteroids
*Signs and symptoms of giant cell arteritis
Pain/ headache in the temple, jaw pain, scalp tenderness, decreased appetite, unexplained weight loss, and malaise(won’t feel well)
*Circulatory impairment in the vessels that supply retina, choroid, and ON. Retina has been affected by HBP, usually sees small retinal hemorrhages.
Hypertensives retinopathy
*Thought to be caused by circulatory problems in the eye in the case of ocular migraines or in the brain in the case of regular headaches. It’s an intense headache with nausea, vomiting, visual scintillations(subjective visual disturbances.ex. Whirling lights, flashing lights, temporary partial or complete loss of vision)
Migraines
Chronic disease of young adults, it’s a problem with the myelin sheath, white matter of spinal cord and brain, causing optic nerve inflammation (optic neuritis). Diagnosed by MRI, CSF exam, or watching for long patterns or symptoms.
Multiple sclerosis
*Disease of the orbit caused by thyroid eye disease or Grave’s disease. Causes eyelids and orbital tissue to swell causing eyes to have forward protrusion(proptosis). Eye muscles swell, causing proptosis which causes dryness, problems with lid and eye movements, loss of va and vf loss due to pressure on ON.
Thyroid orbitipathy
Chronic autoimmune disease. Can occur at any age. Interferes with proper nerve transmission to muscles through out the body. Causes muscle weakness causing diplopia due to muscle swelling, proptosis, trouble swallowing, trouble breathing
Myasthenia Gravis
Autoimmune disease that occurs in women>men. Affects skin, blood vessels, lungs, kidneys, eyes. Ocular symptoms: dry eyes, scleritis, corneal ulcers, retinal vasculitis, optic neuritis.
Butterfly rash common. Treated with systemic or topical corticosteroids.
Systemic Lupus Erythrematosus
Inflammation causing skin and lacrimal gland involvement including nodules and granuloma on the conjunctivita. Origin unclear, occurs more often in blacks and Hispanics. Affects the retina, ON, choroid, and can cause uveitis. Treated with corticosteroids.
Sarcoidosis
Can be inflammatory, idiopathic, or immunologic, causes dry mucous membranes through out the body. Causes dry eyes, dry mouth, KCS (photophobia, grittiness, burning, FB sensation) treated with artificial tears and punctal occlusion.
Sjogren’s Syndrome
Disease caused by HIV virus. Compromises the immune system. Sexually transmitted, needle sticks, and contact with blood or body fluid by someone that is infected. Causes Cytomegalovirus Retinitis, Kaposi’s sarcoma, and HZO.
AIDS
Disease that can be bacterial or parasitic. It is urologic and sexually transmitted. Can be transmitted from genitals to the eyes. Causes conjunctivitis (must treat pt and partners)
Chlamydia
Fungal infection, contracted by inhaling dust spores infected soil. Commonly found in Mississippi River Valley, South American. Asia, and Africa. Affects pulmonary system causing flu like symptoms. Ocular: causes choroidal and retinal scarring and subretinal hemorrhages.
Histoplasmosis
Causes by a protozoan. Can be congenital from mothers uterus or acquired. Can result in death of baby in womb. Occurs due to exposure of animal feces. Can cause swollen glands and mild fever. Ocular: can cause retinal choroiditis, uveitis, and vitritis . Can also occur in association with AIDS.
Toxoplasmosis
A highly contagious STD caused by bacterium, Treponema pallidem. Can result in blindness. Treated with PCN. Ocular: uveitis, functional defects in pupils and optic nerve.
Syphilus
Cancer that spreads throughout the body in the lymphatic system. Choroid is primary site due to its vascularity. Breast cancer commonly metastasis to the choroid. May respond to chemo or radiation.
Metastatic Carcinoma
Any abnormality of the blood. Ex: sickle cell anemia, leukemia, Tay Sachs disease. Can affect ON, optic disc, retinal blood vessels. Regular eye exam required.
Blood Dyscrasiasis
Condition can cause headaches, VF defects, pupillary abnormalities, papilledema. Dx confirmed with MRI or CT scan with contrast dye.
Cerebral neoplasm(Brain Tumor)
Safety glasses break into ______ instead of _______ _______
Crumbles
Sharp shards
Safety glasses frames are designed to retain the lenses under _________ _______. They have to be ________ resistant and may have_______ shields to protect from______
High impact
Flame
Side
Projectiles
*Lens used for industrial setting and has more impact resistant requirements.
Safety lenses
*Lens for street wear. Used in eyeglasses, sunglasses, and non corrective eye wear. Is shatterproof not equivalent to impact resistant.
Impact resistant lenses
Basic impact lens tested with…..
1” steel ball dropped from 50”
Lens must not crack chip or break
High impact lens tested with…
High velocity 1/4” steel ball traveling at 150’ per sec. Has a plus mark on the lens. Lens must not crack chip or break
Lens that are better than glass, especially for welding. More impact resistant than glass but scratch easy.
Plastic hard resin lenses.
*The most impact resistant lenses. Very light weight(half the weight of glass lenses). Prone to scratches without scratch resistant coating.
Polycarbonate lenses
Lens that is oven heated, then cooled to harden the lens.
Heat treated impact resistant lenses
With heated impact resistant lenses industrial use must be no thinner than _____ and general wear must be no thinner than ____ at optical center and _____at edge
3mm
2mm
1mm
What can be used to identify a heated impact resistant lens?
Polariscope
_________treated lenses are more impact resistant than heat treated lenses.
Chemically
Lens is placed in a hot solution of potassium salt for 14 hours. Sodium ions are replaced by potassium ions. While cooling the potassium ions place the surface in a state of compression giving the lens it’s impact resistance.
Chemically treated lenses
What are the 2 types of eye dressings used in ophthalmology?
Pressure patch and patch & shield
Which patch keeps the eye closed and immobile?
Pressure patch
Which patch keeps the eye protected from bumps and prevents rubbing if the eye?
Patch and shield
When taping patches tape is…..
Angles away from the nose and the nasal folds.
How many patches are used for a pressure patch?
2