Opthomology Flashcards
Eyelid & Lashes turned outward
Ectropion
Eyelid & eye lashes turned inward
Entropion
Ectropion is due to the relaxation of the _______ muscle
Orbicularis oculi
Management or Tx for ectropion or Entropion
Sx correction or lubricating eye drops
Tearing, tenderness, edema, & redness to medial canthus
Dacrocystitis infection of the lacrimal sac
MC culprit in Dacrocystitis
S. Aureus, GABHS, S. Epidermis, H flu, S. Pneumo
Eyelid burning, erythema, crusting, scaling, red rimming, and eyelash flaking. seborrheic or infectious
Blepharitis (Inflammation of both eyelids)
MC culprit in Blepharitis
S. Aureus or Staph Epidermis
Blepharitis management Tx
Warm Compress, eyelid hygiene, scrubbing w/ baby shampoo, (Post.= Expression of the Meibomian gland)
Staph Infx: Erythromycin
Doxy: Meibomian Gland Dysfx
Painful, warm, swollen red lump on eyelid. Eyelid margin abscess external sebaceous gland (Ext.)
Internal sebaceous gland (Internal)
Hordeolum (stye)
painless granuloma of the internal Meibomian sebaceous gland. Large, firm, slow growing
Chalazion
Tx for Hordeolum
Warm compress, + or - Abx Erythromycin or Bacitracin
I and D if no drainage w/I 48 hours . most point and drain spontaneously
Tx for chalazion
eyelid hygiene warm compress, abx not necessary, injection of corticosteroid or incision
Injected Triamcinolone steroid if no resolution X 3-4 wks. CI: Dark Pigment Pts
Elevated superficial fleshy, triangular shape growing fibrovascular mass MC in inner corner nasal side of eye
Pterygium
Elevated superficial fleshy, triangular shape growing fibrovascular mass MC in outer corner of eye.
Caused by UV as well as dust and sand exposure. Fat /protein does not grow
Pinguecula
Pinguecula and Pterygium Tx
Observation for most, artificial tears, removal of affects vision or cosmetics reason
Severe conjunctival hemorrhage. Tear drop or irregularly shaped pupil, hyphema, enopthalmus
diplopia, visual acuity reduced ( may be light perception only, ocular pain, prolapse of the iris, obscured red reflex
Globe rupture
Globe rupture tx
Rigid eye shield (stabilize impaled object)
Immediate optho consult : IV Abx
Avoid topical solutions
decreased visual acuity post trauma Diplopia especially w upward gaze. orbital emphysema w nose blowing,
Epistaxis anesthesia to anteromedial cheek due to stretching of infraorbital nerve
orbital blowout fx
diagnostic of choice for blow out fx
CT - will show teardrop sign
Blow Fractures management
Initial - Nasal decongestant (for pain ). Avoid blowing nose and steroids to reduce edema
Abx - Ampicillin/sulbactam or clindamycin
Severe cases require surgery
MC cause of permanent legal blindness and visual loss in the elderly >60. Central vision loss BL and detail/color vis
Scotomas (Blind spots and shadows), metamorphopsia (bent straight lines), micropsia (small obj),
Macular Degeneration
Gradual break down of the macula and central blur. Drusen- Small round yellow spots on outer retina
(Accumulation of waste products from the retinal pigment epithelium)
Dry (Atrophic) Macular degeneration
New abnormal vessels, grow under the central retina, which leak and bleed –>retinal scarring
Progresses rapidly (Fluorescein angiography Dx)
Wet (Neovascular) or exudative Macular Degeneration
Macular Degeneration Dry Tx
Amsler grid at home- monitors stability. Vit A, C, E may slow progression.
Macular Degeneration Wet Tx
Intravitreal anti-angiogenics Bevacizumab- Inh. vascular endothelial growth factor red. neovascularization
Retinal vessel damage leads to ischemia, edema.
Proliferative neovascularization
Non-proliferative Micro aneurysms flame shapes (Cotton wool spots, hard exudates, hemorrhages)
Diabetic Retinopathy
excess sugars attach collagen in vessels –> breakdown of vessel capillary wall
Glycosylation-
Diabetic Neuropathy Tx
Proliferative (Neovascularization)- Bevacizumab, laser coagulation tx, tight glucose control
Maculopathy- Laser
I.Copper wiring-Vessel wall thickening and lumen narrowing, II. AV nicking-compression @ jx by Inc. press.
III Cotton wool spots- fluffy white spots, flame shape hemorrhages, IV papilledema
Hypertensive Retinopathy
Photopsia- Flashing lights–> Floaters–>progressive UL vision loss “Shadow or curtain coming down” periph 1st
–> central visual field. No pain or redness. Detached tissue flapping in vitreous humor. Tobacco dust (Shaffer)
Retinal Detachment
Retinal Detachment type w predisposing factors of myopia and cataracts.
Inner sensory layer detaches from choroid plexus
Rhegmatogenous MC Type
Adhesions separate the retina from its base.
predisposing factors
predisposing factors Proliferative DM retinopathy, sickle cell, trauma
Traction Retinal Detachment
Fluid accumulates beneath the retina–> detachment
Exudative Retinal Detachment
Clumping of brown-colored pigment cells in the ant. vitreous humor resembles Tobacco dust
Shaffer’s sign
Retinal detachment Tx
Optho ER- keep patient supine while awaiting consult don’t use miotic drops
Laser, cryotherapy, ocular surgery
Curtain that lifts up usually within 1 hour
Amaurosis Fugax
FB Sensation, tearing, red and painful eye
Fluorescein staining required
Ocular FB and corneal Abrasions
Ocular FB and corneal Abrasions Tx
Removal w cotton tip swab- No topical anesthetics
Patch for > 5mm. No patching > 24 hours. Rust ring = remove w/I 24 hrs
No patch in contact lens wearers (Pseudomonas) Cipro gtts 24 hr F/U
FB sensation, erythema, and itching. May have viral S/S
pre-auricular LAD, copious water D/C scant mucoid D/C; Follicular response, subepithelial LAD
Often BL. May have punctate staining on slit lamp MC Adenovirus
Viral conjunctivitis
Viral conjunctivitis Tx
cold compress, artificial tears
Nerve and muscle that closes the eye
Cranial nerve VII (Facial) and Orbicularis Muscle
Nerve and muscle that opens the eye
cranial Nerve III (Oculomotor) Levator muscle and muellers
Muscle that assists opening the eyelids
Mueller’s Muscle
Produces aqueous humor
Ciliary Body
Allows focus on near objects, accommodates or contracts creating changes on zonular fibers
Ciliary Muscle
Provides blood supply for the outer retinal layers
Choroid
Responsible for fine central vision, depression in the center is fovea. Contains mostly cones
Macula
Location where nerve fibers converge and leave the eye (Physiologic blind spot )
Optic disc
considered moderate low vision
20/80- 20/160
Meds for dilation
Mydriatics
Cholinergic Blocking medication lasting Max effect 30 min. lasts 2-6 hours
Tropicamide
Cholinergic Blocking medication lasting Max effect 340 min. lasts 1-2 weeks
Atropine
what to look for in eye exam
Red reflex Optic Disk Retinal circulation Retinal Background Macula
Intraocular pressure ranges
10 - 21 mmhg with tonometer
standard of care measurement for IOP
Goldmann Tonometry
Iris bows forward in patient with shallow chamber creating a shadow when shining a light from side
Risk for angle glaucoma
Evaluates the Macula
Amsler grid testing
Farsightedness Axis Length of the eye is too______
+ Hyperopia (short )
Nearsightedness Axis Length of the eye is too______
- Myopia (Long )
Eye shaped more like a football
Astigmatism
Old eyes loss of accommodation
Presbyopia
Eyes are parallel when both eyes are open but when you cover one eye the covered eye moves away
Heterophoria ( Eso, Exo, Hyper, Hypo, cyclo)
condition when both eyes do not point in the same direction when both eyes are open
Heterotropia (Eso in, Exo out, Hyper up, hypo down)
Misalignment of the two eyes
Strabismus
Double vision
Diplopia
Eye that is deviated most of the time with increased poor vision
Defective vision without detectable anatomic damage
Amblyopia (Lazy eye)
Test used to find deviation during light reflex deviation
Hirschberg Test
Strabismus Tx
Patching of the better eye to force use of bad eye. Full time patching is best. 1 week/year of age
Over age 11 typically unsuccesful
The inability to completely close eyes
Lagophthalmos
Meibomian Gland dysfunction Blepharitis Tx
Doxycycline
inflammation of the lacrimal sack S/S tearing, pain, erythema, mucopurulent discharge
Dacrocystitis