Ophthalmology

Acute Closed-angle Glaucoma
features
Acute – emergency
S/S
·       Hx: halos around light, pain, red eye
·       On physical exam
·       the pupil is mid-dilated and does not react to light,
·       the cornea is cloudy with a greenish hue,
·       and the eye feels “hard as a rock.”
Dx
Clx – EMERGENCY
Tx
There are 2 issues:
1.     Pressure: we need to lower it down (open a hole in the eye)
2.     Dilation: we need to reverse that by ACTIVATING ALPHA & BLOCKING BETA
a.     A-agonist
b.     B-Blocker
Open Angle Glaucoma
RFs
·       Aferican-American 👨🏾‍⚖️
·       FHx
·       DM
S/S
·       initially Asx
·       Loss of PERIPHERAL VISION → progress to tunnel vision
Dx
⤴️ IOP
Ophthalmoscopy: cupping of optic n.
Tx
1˚ BB (timolol) eye drops
2˚ Laser
3˚ if still ⤴️ IOP: surgical trabeculectomy
Orbital Cellulitis
features
EMERGENCY
S/S
·      Febrile
·      Restricted eye movements
Dx
CT
Tx
I/D + IV ABx
Macular Degeneration
RF
·       ⤴️ Age
·       Smoking
S/S
·       Wet / Dry
·       Asx
·       Grid test: early signs: Straigt line appear wavy ✳️
Dx
Ophthalmoscope: drusen deposits
Tx
Dry has no tx.
Retinal Detachment
RF
·       Myopia
·       Trauma
·       Surgery
·       DM Retinopathy
(predisposing event usually occur months before Sx happens)
S/S
·       Flashes of light
·       Floaters,
·       a big dark cloud at the top of his visual field –> SEVERE
Dx
Clx
Ophthalmoscopy: Grey, elevated retina
Tx
LASER (spot welding)
DDx
Amox fogas: intermittent retinal artery occlusion
·       Presents the same as above, but “comes & goes”
Choroidal rupture
Nx
Blunt Ocular Trauma
S/S
Blurred vision following trauma
Dx
Opthalmoscopy:
·       Central scotoma
·       Edema
·       Crescent-shaped streak around optical n.
·       hemorrhage (w/ seperation of macula)
Central Retinal A. Occlusion (CROA)
features
In about 30 minutes the damage will be irreversible
S/S
·       Sudden vision loss,
·       PAINLESS
·       Cherry red spot
Dx
·       Pale optic disc
·       Cherry red fovea
Tx
🚨 1˚ OCULAR MASSAGE + O2
Chemical Burn of the eye
Dx
Hx + Clx
Tx
·       Irrigation with plain water has to be started as soon as possible wherever the injury happened; it cannot wait until arrival at the hospital.
·       Then to ER → saline irrigation & remove any particle
·       Before D/C: pH is tested to assure that no harmful chemicals remain in the conjunctival sac
Anterior Uveitis
features
·       Inflammation of uveal tract, which includes
·       iris (anterior)
·       cilliary body (anterior)
·       choroid (posterior)
·       HLA-B27
S/S
·      Redness + Pain = Anterior
·      ⤵️  Vision + floaters = Posterior
·      constricted pupil with abnormal pupil response
·      Severe photophobia
Dx
Clx
Tx
Corticosteroids
Optic neuritis
#
·       Primarily in young 👩🏻
·       Associated with MS
·       Immune-mediated demyelination
Clx
·       Acute, peaks at 2 weeks
·       Monocular vision loss
·       Eye pain with movement
·       “Washed-out” color vision
·       Afferent pupillary defect
Dx
·       MRI of the orbits & brain
Tx
·       IV corticosteroids
·       35% of cases recur
Optic Neuritis
features
·       👩🏻
·       Inflammation of optic n
·       Seen w/ MS
S/S
·       Mono-ocular LOV
·       Eye pain w/ movement
·       Washed-out” color vision
·       Afferent pupillary defect
Dx
MRI
Tx
IV Corticosteroids
Episcleritis
features
·       may be associated w/ RA
S/S
redness
Dx
phenylphrine
Tx
Self-limited

 

KERATITIS
UVEITIS
ACUTE ANGLE CLOSURE GLAUCOMA
S/S
Redness
Pain
Tearing
Photophobia
Redness
Pain
Tearing
Photophobia
Frontal headache, transient attach of blurred vision in the evening
Central vision
⤵️(distant+near)
Distant blurred
Near > disturbed
⤵️⤵️(distant + near)
Visual field
normal
floaters
Pt is too disturbed to evaluate it
Cornea
Lost corneal luster
Muddy cornea
Edematous, obscuring deeper signs
pupil
normal
Small + spastic
Fixed + dilated
AC
deep
Full of cells + flares
Shallow
IOP
normal
normal
High, rock-hard, acutely tender
Conjunctivitis
Viral
Bacterial
Allergic
#
Eye stuck in morning?
DC?
Watery
PUS, colored, thick
Watery
dischareg comes back after wiping?
Conjunctival appearance
Follicular
Nonfollicular
·       Follicular “bumpy”
·       Conjunctival edema “chemosis”
Other points
·       Viral prodrome
·       Sandy feeling
·       Burning
ø
·       Hx of allergy
·       Itching

Sebacous cell carcinoma
Ddx from Chalazion (chronic painless inflam of mebious glands) –> Bx lesion
Chalazion
·       chronic painless inflam of mebious glands
·       Tx: ABx + incision/drianage

Ped
Amblyopia
features
·       Path: Cortical blindness –> lack of visual stimulation causes the brain to just shut off the cortical input –> blindness
·       Once it’s there, it’s there
·       Multiple etiologies: Strabismus, Retinopathy of prematurity, Cong Cataracts
S/S
Depends on the etiology.
Dx
Clx
Tx
Tx the underlying  cause.
Strabismus / الحَول
features
·       Path:
·       The 2 eyes are normal, but not properly aligned the same
·       Can be devided based on etiology (easier):
o   Idiopathic
o   Refractive
o   Restrictive –> muscular (like w/ Graves)
o   Paralytic –> Neural (3rd CN palsy)
S/S
Extropia / Entropia
Dx
Clx
Tx
If at birth –> Surgery / If acquired –> Patch / Glasses.
Strabismus (ocular misalignment)
Abnormal findings
·       Constant strabismus at any age
·       Eye deviation after 4 months of age
·       Asymmetric corneal light reflexes
·       Asymmetric intensity of red reflexes
·       Deviation on cover test
·       Torticollis or head tilt
Tx options
·       Penalization therapy: Cycloplegic
·       drops to blur normal eye
·       Occlusion therapy: Patch normal eye
·       Prescription eyeglasses
·       Surgery
Complications
·       Amblyopia
·       Diplopia
Congenital Cataract
features
No red reflex
S/S
WHITE CLOUDY EYE AT BIRTH
Dx
Clx
Tx
Remove cataract
Retinoblastoma
features
·       Red reflex is not there. Instead, a white reflex
·       EMERGENCY
S/S
Leukocoria
Dx
Clx, on PEx
Tx
Surgery
Retinopathy of prematurity
features
·      Premature baby recieving high dose O2
·      Blood vessel grows abnormally on the retina
S/S
·       PEx: growths on the eye
 
Dx
Clx
Tx
·       Laser
·       F/U other complications of prematurity
·       Intraventricular hemorrhage –> US w/ Doppler
·       NEC
·       Bronchopulmonary dysplasia