Ophthalmic Assistant class – Flashcards
36 test answers
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Name 2 things you have to do to get COA.
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1) Complete the class. 2) Work for Ophthalmology as an Ophthalmic Assistant for 6 months.
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What are the 3 'O' ?
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1) Ophthalmology 2) Optometry 3) Opticianry
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Ophthalmology
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The branch of medicine concerned with the eye and its diseases.
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Optometry
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Measurement of vision and adaptation of lenses.
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Opticianry
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The professional practice of filling prescriptions for ophthalmic lenses, dispensing eyeglasses, and fitting contact lenses.
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What is required to get Ophthalmology degree?
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4 yrs college and 3 yrs in residency.
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What is required to get Optometry degree?
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4 yrs college.
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What is required to get Opticianry degree?
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3 yrs in college
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Ophthalmologist and Optometrist are _______.
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Doctors
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How many layers does the Cornea have?
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5
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What are the layers of the Cornea
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1) Epithelium - 5 or 6 cells thick 2) Bowman's Membrane 3) Stroma - 4) DesceMet's Membrane 5) Endothelium - 1 cells thick
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How thick is the Epithelium layer?
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5 or 6 cells thick.
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How thick is the adult cornea?
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About 1/2 millimeter thick
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What is the Cornea?
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It is the transparent, dome-shaped window covering the front of the eye. It is a powerful refracting surface, providing 2/3 of the eye's focusing power.
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How thick is the Endothelium layer?
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1 cell thick
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What is the job of the Bowman's Membrane layer ?
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It is very tough and difficult to penetrate, it protects the cornea from injury.
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What is the job of the Stroma layer?
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It is composed of tiny collagen fibrils that run parallel to each other. This gives the Cornea its clarity.
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What are Collagen Fibrils?
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A protein present throughout the body that promotes stiffness in tissues(the white of the eye).
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What is the job of Endothelium layer?
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Pumps water from the cornea to keep it clean. Carries nutrients to the Cornea.
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Which Cornea layer does not repair itself?
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Endothelium layer.
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What is the thickest layer of the Cornea?
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Stroma layer.
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What does 'Avascular' mean ?
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Not associated with or supplied by blood vessels.
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How many layers does the 'tear film' have?
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3
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What are the layers of the 'tear' film?
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1) Lipid or oil layer 2) Lacrimal or aqueous layer 3) Mucoid or mucin layer
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What does the lipid or oil layer do in the 'tear film'?
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Keeps the tear from evaporating.
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What does the lacrimal or aqueous layer do in the 'tear film'?
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1) Takes the main nutrients (such as oxygen) to the cornea. 2) Carries waste products away from the cornea 3) Helps to prevent corneal infection and 4) Maintains the tonicity of the tear film.
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What does the mucoid or mucin layer do in the 'teat film'?
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Helps the tear to remain on the corneal surface of the Cornea without rolling off. It is a mucus which makes it stickey.
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what are microvilli ?
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resides on the Epithelium layer to furnish oxygen to Cornea.
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What is dry eye?
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A deficiency of any of the three layers of the tear film. It causes anything from mild eye irritation to severe pain.
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How often is the Epithelium layer regenerated?
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Every 72 hrs.
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What part of the body has the highest concentration of nerve fibers.
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The Cornea.
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What covers the nerves to help them not to be so sensitive?
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Malien. Its a wax covering.
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