Health Asses Eyes
Eye Anatomy and Assessment Notes
Page 2: Eye Anatomy Overview
Key Components of Eye Anatomy
Brow: Protective structure above the eye.
Upper Lid: Covers the upper part of the eye.
Caruncle: Small, fleshy mass at the inner corner of the eye.
Lacrimal Gland: Produces tears for lubrication.
Sclera: White outer layer of the eyeball.
Iris: Colored part of the eye, controls pupil size.
Pupil: Opening in the center of the iris that regulates light entry.
Page 3: External Anatomy and Assessment
External Structures
Eyelids: Protect the eye and help spread tears.
Palpebral Fissure: Space between the eyelids.
Limbus: Junction between the cornea and sclera.
Canthus: Corners of the eye.
Conjunctiva: Mucous membrane covering the eye.
Lacrimal Apparatus: System for tear production and drainage.
Assessment Criteria
Eyelids should cover half of the upper iris.
No swelling or tenderness in tear ducts.
Conjunctiva should be smooth and pink; sclera should be white and smooth.
Page 4: Internal Eye Anatomy
Layers of the Eye
Outer Layer: Cornea.
Middle Layer: Choroid, Pupil, Lens, Anterior Chamber, Posterior Chamber.
Inner Layer: Retina, Optic Disc, Retinal Vessels, Macula, Fovea Centralis.
Page 5: Muscle Attachments and Directions
Muscle Attachments
Superior oblique, superior rectus, medial rectus, lateral rectus, inferior oblique, inferior rectus.
Cranial Nerve Innervation
Various muscles innervated by cranial nerves III, IV, and VI.
Page 6: Visual Pathways and Reflexes
Visual Pathways
Pupillary Light Reflex: Direct and consensual responses.
Fixation and Accommodation: Adjustments for near and distant vision.
Page 7: Pupillary Light Reflex
Reflex Mechanisms
Direct Light Reflex: Constriction of the pupil in response to light.
Consensual Light Reflex: Constriction of the opposite pupil.
Page 8: Developmental Changes in Aging Adults
Aging Effects
Decreased skin elasticity and tear production.
Changes in pupil size and lens clarity.
Increased risk of cataracts, glaucoma, and macular degeneration.
Page 9: Subjective Data Collection
Key Questions for Patients
Vision difficulties, pain, strabismus, redness, discharge, history of ocular problems, use of glasses or contacts.
Page 10: Additional Subjective Data
Vision Symptoms
Floaters, halos, scotoma, night blindness.
Pain quality and sudden onset.
History of allergies or medications affecting ocular pressure.
Page 11: Objective Data Testing
Visual Acuity Testing
Snellen Eye Chart: Measures distance vision; normal acuity is 20/20.
Near vision assessment for presbyopia.
Page 12: Visual Acuity Tests
Types of Tests
Distance, near, handheld vision screener, peripheral vision tests.
Page 13: Visual Fields and Muscle Function
Testing Methods
Confrontation test for peripheral vision.
Corneal light reflex for alignment.
Cover test for muscle movement assessment.
Page 14: Diagnostic Positions Test
Cardinal Fields of Gaze
Assesses eye movement and muscle function.
Page 15: External Structure Inspection
Inspection Areas
Eyebrows, eyelids, lashes, conjunctiva, sclera, cornea, lens, iris, pupil.
Page 16: Accommodation Response
Pupil Response
Pupils dilate for far vision and constrict for near vision.
Page 17: Ophthalmoscope Examination
Key Observations
Ocular fundus, red reflex, optic disk characteristics, retinal vessels.
Page 18: Cataract Formation
Characteristics
Lens opacity, cloudy pupil, protein clumping.
Page 19: Glaucoma
Symptoms and Risks
Increased intraocular pressure, gradual peripheral vision loss, more common in older adults.
Page 20: Macular Degeneration
Impact
Loss of central vision, difficulty distinguishing faces.
Page 21: Conjunctivitis
Causes and Symptoms
Allergies, infections, or irritation; redness and possible discharge.
Page 22: PERRLA Assessment
Pupil Evaluation
Pupils should be equal, round, reactive to light, and accommodate.
Page 23: Interactions with Other Systems
Systemic Connections
Cardiovascular, endocrine, respiratory, renal, and neurological impacts on ocular health.
Page 24: Physical Assessment Overview
Assessment Components
Inspection of external and anterior structures, visual acuity, visual fields, and extraocular muscle movements.
Page 25: Conclusion
Visual Health Importance
Regular assessments and awareness of changes in vision are crucial