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Chapter 18 Eye Pathologies Copyright © 2015. F.A. Davis Company Clinical Anatomy Identify Bony anatomy Orbit Sphenoid Lacrimal Ethmoid Palatine bone Orbital margin Frontal bone Zygomatic bone Maxillary bone Superior orbital fissure Optic canal Copyright © 2015. F.A. Davis Company Eye Structures Identify Globe Sclera Pupil Iris Conjunctiva Cornea Lens Retina Choroid Rods and cones Optic nerve Eyelids Copyright © 2015. F.A. Davis Company Muscular Anatomy Identify Rectus muscles Inferior Medial Lateral Superior Oblique muscles Inferior Superior Copyright © 2015. F.A. Davis Company Visual Acuity Visual acuity—quality of vision Snellen eye chart Emmetropia—20/20 vision The athlete’s ability to read at 20 ft what a normal person could read at 20 ft 20/40—The athlete’s ability to read at 20 ft what a normal person could read at 40 ft Myopia—nearsightedness Hypermetropia (hyperopia)— farsightedness Copyright © 2015. F.A. Davis Company Clinical Examination of Eye Injuries Evaluation map History Inspection Palpation Functional assessment Neurological examination Pathologies and special tests Copyright © 2015. F.A. Davis Company Evaluation Supplies Needed for Eye Injuries Snellen chart or similar Occluder Penlight Cobalt blue light Small mirror Fluorescein strips Copyright © 2015. F.A. Davis Company Management Supplies Needed for Eye Injuries Eye shield Eye patch Tape Plunger for removing hard contact lenses Sterile saline solution Sterile cotton swabs and gauze Antibiotic eyedrops Copyright © 2015. F.A. Davis Company Steri-Strips™ or butterfly bandages Contact information of consulting ophthalmologist Contact information of hospital or poison control center History Past medical history Prior visual assessment Prior visual acuity? Corrective lenses? Nystagmus? Previous injuries? Preexisting conditions? General health Chronic illness (e.g., diabetes—retinopathy) Copyright © 2015. F.A. Davis Company History of the present condition Location and description of symptoms Photophobia? “Something in my eye” Foreign body Displaced lens Corneal abrasion “Itchy” Chemosis Injury mechanism Blunt Eye Trauma and the Resulting Eye Pathology* Size Relative to the Orbit Elastic Property Resulting Pathology Larger Hard Orbital fracture, periorbital contusion Larger Elastic Blowout fracture, ruptured globe, corneal abrasion, traumatic iritis, periorbital contusion Smaller Hard Ruptured globe, corneal abrasion, corneal laceration, traumatic iritis Smaller Elastic Ruptured globe, blowout fracture, corneal abrasion, traumatic iritis *All of these mechanisms of injury can result in subconjunctival hemorrhage and retinal pathology. Copyright © 2015. F.A. Davis Company Inspection Trauma to external structures may mask underlying pathology. A normal external eye may still have internal damage. Immediate referral findings See Table 18-4 in the text Copyright © 2015. F.A. Davis Company Inspection of the Periorbital Area Discoloration Hematoma Gross deformity Gross bony deformity Skin surrounding eye swells easily Lacerations Copyright © 2015. F.A. Davis Company Inspection of the Globe General appearance Enophthalmos Exophthalmos Eyelids Swelling Ecchymosis Lacerations Stye Cornea Cloudiness = intraocular pressure Hyphema Copyright © 2015. F.A. Davis Company Inspection of the Globe Conjunctiva “Teardrop” pupil Foreign body Subconjunctival hematoma Sclera Black object may be the inner tissue of the bulging out Iris Iritis Pupil shape and size Anisocoria Copyright © 2015. F.A. Davis Company Corneal laceration Ruptured globe Palpation Bony structures Orbital margin Frontal Nasal Zygomatic bones Soft tissue Eyelid and skin surrounding the eye GLOBE Copyright © 2015. F.A. Davis Company Functional Assessment Vision assessment Devices Snellen eye chart Near-vision card Newspaper Game program Fingers Monocularly (one eye) Binocularly (both eyes) Wear corrective lenses at the time of assessment Copyright © 2015. F.A. Davis Company Pupillary reaction to light Dysfunction Dilation Diminished PEARLA Indicates Head trauma Eye motility Smooth, symmetrical ROM Selective Tissue Test: Assessment of Eye Motility Copyright © 2015. F.A. Davis Company Snellen Eye Chart Copyright © 2015. F.A. Davis Company Neurological Testing Cranial nerves III, IV, and VI Infraorbital nerve Numbness of the cheek and lateral nose Orbital floor fracture Copyright © 2015. F.A. Davis Company Eye Pathologies Orbital fractures Corneal abrasions Corneal lacerations Iritis Hyphema Retinal detachment Ruptured globe Conjunctivitis Foreign bodies Copyright © 2015. F.A. Davis Company Orbital Fracture Blowout fractures Medial wall and floor fracture Blow-up fractures Orbital roof fracture Management Ice packs if asymptomatic (besides pain) If pain with movement Shield eye “Look straight ahead” Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Hyphema Blood in the anterior chamber of the eye MOI Blunt trauma Spontaneous Management Patching or shielding Referral to ER Usually resolves in 5 to 6 days Copyright © 2015. F.A. Davis Company Retinal Detachment MOI Jarring force to the head Sneezing Spontaneous Marfan syndrome Signs and symptoms Flashes of light, halos, or blind spots “A curtain came down” Management Often requires surgery Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Copyright © 2015. F.A. Davis Company Foreign Bodies Management Attempt to find the body Flush out with saline Wet cotton applicator or gauze to blot out body “Do not rub your eye” Copyright © 2015. F.A. Davis Company Contact Lens Removal Remove ASAP after injury Ask athlete to remove lens Hard contact lens removal Open the patient’s eyes as wide as possible. Pull laterally on the outer margin of the patient’s eyelids. While holding a hand under the eye to catch the lens, the patient blinks, forcing the lens out of the eye. Copyright © 2015. F.A. Davis Company Contact Lens Removal Soft contact lens removal Have the patient look upward. Place a clean finger on the inferior edge of the contact lens. Manipulate the lens inferiorly and laterally. Pinch the lens between the fingers and safely remove it from the eye. Ensure all pieces are removed from the eye. Copyright © 2015. F.A. Davis Company Penetrating Eye Injuries Management Never attempt to remove the object Cover and protect the eye Cup Cover both eyes to minimize movement Transport to ER Copyright © 2015. F.A. Davis Company Chemical Burns Management Irrigate eye with saline or water Patch the eye Transport to ER, with sample of chemical Copyright © 2015. F.A. Davis Company