AAPC Official Study Guide 13
(2025-2026)
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, Eye and Ocular Adnexa Focuses on vision and associated structures
Auditory Systems Responsible for hearing and balance
Scope of coding - Diagnostic procedures (e.g., visual
field testing, audiometry)
- Surgical interventions (e.g., cataract
extraction, cochlear implants)
- Therapeutic procedures (e.g., laser
surgeries, hearing aids)
Eye Cornea, lense, retina, optic nerve
Cornea "Bay window of the eye". The cornea has five layers and they act to refract light
entering the eye.
What are the five layers of the cornea? 1. Epithelium
2. Bowman's membrane
3. Stroma
4. Descemet's membrane
5. Endothelium
Lense A clear, flexible, biconvex structure located behind the iris that focuses light onto the
retina by changing shape during accommidation.
retina Layer of tissue in the back of the eye that is light sensitive
Optic nerve Nerve that transmit images from the eye to the brain. Damage to the optic nerve
can result in loss of or impaired vision.
Adnexa Eyelids, conjuntiva, lacrimal apparatus
Eyelids are movable folds of skin and muscle that protect the eye, and spread tears
Conjunctiva Thin protective layer lining the eyelid and covering the sclera
Lacrimal apparatus tear‑producing and tear‑draining system responsible for secretion, distribution, and
drainage.
Functions of the eye and and adnexa - Vision
- Protection and lubrication of the eye
(2025-2026)
Question and Answers
Expert Verified
(With A+ Grades Guarantee)
, Eye and Ocular Adnexa Focuses on vision and associated structures
Auditory Systems Responsible for hearing and balance
Scope of coding - Diagnostic procedures (e.g., visual
field testing, audiometry)
- Surgical interventions (e.g., cataract
extraction, cochlear implants)
- Therapeutic procedures (e.g., laser
surgeries, hearing aids)
Eye Cornea, lense, retina, optic nerve
Cornea "Bay window of the eye". The cornea has five layers and they act to refract light
entering the eye.
What are the five layers of the cornea? 1. Epithelium
2. Bowman's membrane
3. Stroma
4. Descemet's membrane
5. Endothelium
Lense A clear, flexible, biconvex structure located behind the iris that focuses light onto the
retina by changing shape during accommidation.
retina Layer of tissue in the back of the eye that is light sensitive
Optic nerve Nerve that transmit images from the eye to the brain. Damage to the optic nerve
can result in loss of or impaired vision.
Adnexa Eyelids, conjuntiva, lacrimal apparatus
Eyelids are movable folds of skin and muscle that protect the eye, and spread tears
Conjunctiva Thin protective layer lining the eyelid and covering the sclera
Lacrimal apparatus tear‑producing and tear‑draining system responsible for secretion, distribution, and
drainage.
Functions of the eye and and adnexa - Vision
- Protection and lubrication of the eye
