Color Blindness is common in which of the following?
The eye ball is moved by how many extrinsic muscles?
What vision enables three dimensional vision views?
What is the outermost layer of posterior and lateral aspects of the eyeball?
B. choroid lines
What part of the eye is a visible colored ring in the front of the eye?
A. aqueous fluid
C. pensory ligaments
What is the innermost lining of the eyeball?
C. macula lutea
When assisting for a Vitrectomy what is the position, anesthesia, skin prep and draping technique for the patient?
Position: the patient is in supine position with arms tucked, head is on head rest.
Anesthesia: is retrobulbar block and or general.
Skin prep: Betadine 5% ophthalmic solution
Draping: Head drape or adhesive U drape. Sheet around operative area.
Explain three ways hemostatis is controlled during a DCR procedure.
1. With topical anesthetic cocaine.
2. Bipolar electrosurgical unit
3. Gelatin sponges.
Matching key words to definitions:
- Medial rectus A. Rotates eye ball downwards and outwards
- Inferior rectus B. Rotates eye ball outwards
- Inferior oblique C. Rotates eye ball downwards
- Lateral rectus. D. Rotates eye ball upwards and outward
- Superior oblique E. Rotates eye ball inward
- Superior rectus F. Rotates eye ball upwards
- the outer fibrous layer. A. retina
- the middle vascular layer B. sclera and cornea
- the inner nervous tissue layer. C. choroid, ciliary body and iris
Lateral wall of the middle ear is formed by which?
a. Temporal bone
b. Oval window
C. tympanic membrane.
C. Tympanic membrane
This bone is the medial “stirrup-snapped” bone in the auditory ossicles.
This is the visible portion of the ear that projects on the side of the head.
A. External acoustic meatus
C. Tympanic membrane
Which cranial nerve is the ear supported by?
When preparing to assist for a Keratoplasty what important for the back table in regards to the donor cornea?
The surgeon may request the their is a separate back table specific for the preparation of the donor cornea.
Explain the three forms of strabismus in an affected eye.
1. Esotropia-affected eye is turned medially
2. Exotropia- affected eye turns laterally
3. Hypertrophia- affected eye turns upward
Explain the difference between rods and cones.
Rods allow shades of gray in dim light and also general shapes of outlines.
Cones provides color vision and ability to see sharp images.
Explain the difference between enunciation and evisceration
Enucleation is an excision of the eye due to malignancy
Evisceration allows the retention of the sclera and extrinsic muscles of the eye.