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Ocular A&P #11 Final

Questions Ocular A&P: Physiological Optics, Vascular & Lymphatic System

QuestionAnswer
What is the approximate power of the eye optical system? 60d
What is the approximate power of the cornea? 43.5d
What is the approximate power of the lens? 16-20d
A too large pupil creates ____________ aberration. Spherical
A convex lens causes _________________ of the image. Magnification
What is the cause of presbyopia? Age
What type of astigmatism cannot be corrected with glasses? Irregular
What are two visual problems with aphakia? Jack in the box-midperipheral scotoma, 30% magnification with glasses. Thick heavy lenses. If only one eye has aphakia, creates too much anisometropia and anisekonia.
Name the lower order aberrations. Refractive errors (myopia, hyperopia, regular astigmatism)
With the rule astigmatism has the steepest meridian at ___________ meridian, _________degrees axis. Superior, 90°
Stereopsis occurs at ___________ degree fusion. Third
A concave lens bends lights towards the ______________ and corrects _____________. Periphery / Myopia
What device is used manually to measure astigmatism? Keratometer
What device is used automatically to map the surface of the cornea? Corneal topography
What device is used to perform refractions? Phoropter
What is the blood supply to the inner retina? Central Retinal Artery
What is the blood supply to the outer retina? Choriocapillaris
What is the blood supply to the choroid? Ciliary Arteries
What is the main artery that supplies most of the blood to the eye and the adnexa? Ophthalmic- a branch of the internal carotid
What drains the choroid? Vortex Veins
What drains the retina? Central Retinal Vein
All the blood from the eye and adnexa drain to here _______________________. Cavernous sinus in the brain.
What is the blood supply to the fovea? Choriocapillaris
What is produced by the lymph nodes? Lymphocytes and monocytes
The medial lids and the lacrimal sac drain to the _________________. Submandibular nodes
The lateral lids and the lacrimal gland drain to the ________________. Preauricular nodes
What are the primary non-specific defense tools (first line of defense against injury)? Tears, sweat, saliva, skin, corneal epithelium
How many vortex veins are there? 4 to 6
What is the function of the lymph system? Collects lymph from vessels and tissues and transports it to nodes to filter out bacteria, etc, and to produce cells to fight infections.
The cilioretinal artery is from the ________________. Ciliary arteries
The external face and head are supplied by the _______________________. External carodtid
What are the four signs of inflammation? Heat, swelling, pain, redness.
Created by: Leequa