Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ocular A&P #11 Final

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

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