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Types of closed globe injury
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ContusionSuperficial foreign bodyLamellar laceration
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Types of open globe injury
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Laceration-penetration injury-perforating injury-IOFB Rupture
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Etiology of subconjunctival hemorrhage
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SpontaneousIncrease in Venous pressure *Valsalva while coughing, sneezing, vomiting, straining*Traumatic-Major (blunt)-Minor (contact lenses)
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Risk factors for subconjunctival hemorrhage
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HTNDMBleeding disordersAnticoagulant therapy
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In which population is subconjunctival hemorrhage common?
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The elderly
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Clinical manifestation of subconjunctival hemorrhage
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Focal and flat, sharply demarcated area of bleed between sclera and conjunctiva - basically their eye is blood red, ith clear distinction of where blood stops.NOTE: patient will have normal visual acuity without pain or sensation of foreign body, photophobia or discharge
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Treatment for subconjunctival hemorrhage
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Self-resolving, so watch and wait as blood is absorbed over 2-3 weeks, with follow up with opthalmology with tramatic hemorrhages to evaluate for retinal trauma
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Globe rupture etiology
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1. Blunt or penetrating injury leading to scleral rupture2. Blunt traumaa. direct force, transmitted wave force, rebound wave forceb. abrupt increase in IntraOcular Pressure3. Penetrating injurya. any projectileb. eyelid laceration/penetration
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Where does the globe rupture
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At the thinnest point of the sclera, limbus, or insertion of the intraocular muscles
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Where is a Zone 1 injury?
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Inury to cornea or limbus
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Where is a zone 2 injury?
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Injury to anterior 5 mm of sclera
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Where is a zone 3 injury?
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5 mm posterior to the limbus
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What is Seidel sign?
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Aqueous Humor that is leaking from the anterior chamber will wash away fluorescein dye **EVIDENCE OF PENETRATING GLOBE INJURY**
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![]() What is Seidel sign used to test for? |
Penetrating globe injury dye will be washed away if the globe is ruptured (allowing aqueous humor to leak from anterior chamber)
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What injury are Marcus Gunn pupils seen in?
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Ruptured globe, causing afferent defect.
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