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Contacts Test 3
Indication/Contraindications and Slit Lamp
| Question | Answer |
|---|---|
| What is needed before fitting contact lenses? | A thorough patient history; an eye exam and a vision exam; patient lifestyle; past and present abnormalities; infections, injury, eye surgeries, or eye disease |
| All information should be _______ and ______. | recorded and dated |
| What are some respiratory disorders that could effect contact wear? | Rhinitis; sinusitis; hay fever; asthma; allergies |
| What problems do respiratory disorders cause that effect contact wear? | enlarged blood vessels; photophobia; itching; lacrimation; burning; ocular sensitivity; debris in the tears |
| Patients with respiratory disorders would be best fit with _________? | single use |
| What problems will patients with diabetes have with contact wear? | have a higher risk of infection, due to decreased healing process; need more follow-ups; need to be warned about over-wearing, cleaning properly, throwing out when supposed to |
| Patients with diabetes are good candidates for single use depending on the ________? | prescription |
| What type of endocrine (hormonal) changes effect contact wear and why? | Pregnancy, menopause, and the use of birth control pills; causes dry eyes and deposits on lenses |
| How does thyroid disease effect contact wear? | protrusion and drying of the eyes can cause the lens to dislodge easier |
| What are two other things protrusion is known as? | exophthalmos and proptosis |
| What problems does rheumatoid arthritis cause for wearing contacts? | dry eyes and may have problem handling lenses |
| What is Keratitis Sicca or Keratoconjunctivitis Sicca? | severely dry eyes which causes the cornea to break; causes higher risk of infection |
| What type of skin diseases can effect contact wear if they are found around the eyes? | Seborrhea; psoriasis; neurodermatitis; blepharitis; rosacea; eczema |
| What type of patient should never be fit with contacts and why? | Monocular patients; don't want to risk blindness due to infection |
| What are monocular patients best fit with? | Polycarbonate or Trivex |
| What type of medications effect contact wear? | Acutane; Dyazide and Lasix; Lanoxin; Donnatal; Valium; Antihistamines; Decongestants |
| What complications can medications cause that effect contact wear? | dry eyes; photophobia; fluctuation in vision; decreased corneal sensitivity; decreased blink rate; mydriases; also can effect lids and conjunctiva |
| What advantages do contacts provide for aphakes or high hyperopes? | less distortion and less magnification |
| What is the magnification for glasses compared to contact lenses? | Glasses 25-30%; Contacts 7% |
| What advantages do contacts allow for anisometropia (unequal refractive power)? | Less distortion using contact lenses and reduces image size difference compared to glasses. |
| What advantages do contacts allow for high myopes? | gives them closer to normal vision; glasses make everything look smaller |
| What advantages do contacts allow for patients with irregular corneal astigmatism? | cannot be corrected with glasses; must be fitted with GP |
| How does a GP lens correct irregular corneal astigmatism? | The lacrimal lens (tears behind the lens) corrects the astigmatism |
| How do contacts help with keratoconus? | Kerataconus patients have irregular astigmatism, steep corneas, and unusual refractive errors which are best corrected with GP lenses |
| Patients with corneal disease are best fit with....? | therapeutic or bandage lenses; not candidates for regular contacts |
| How can contacts help patients with aniridea or ocular albinism? | special iris lenses or opaque lenses; blocks out some of the light which allows better VA and reduces photophobia |
| How do contacts help patients with nystagmus? | colored contact will help with VA and reduce the movement |
| What type of occupations and hobbies work well with contacts? | patients that are in and out in different temperatures; patients that are out in the weather; use a microscope all day; all active sports |
| Why do myopes that are beginning to have presbyopia not work well with contacts? | have trouble reading up close with contacts |
| What is a psuedomona? | A bacteria found in water that can cause you to lose your eye in 24 hours. |
| What is an acanthamoeba? | A parasite that lives in water, that can cause severe pain |
| What type of contacts should pilots never be fitted with? | monovision |
| Because of the instruments used by pilots and police officers they should never be prescribed what type of sunglasses? | Polarized or blue blockers |
| What is another name for the slit lamp? | Biomicroscope |
| What magnification should we start with during a slit lamp exam? | 6X or 10X |
| What type of illumination should we start with during a slit lamp exam? | low illumination |
| How much of angle should be between the light and the microscope? | 45-50 degree |
| What should the height of the light be to begin with? | 12 mm |
| What should the width of the light beam be to begin with? | 2-3 mm |
| Where should the light beam be to begin with while you are making adjustments? | On the outer canthus |
| What does all the focusing on the slit lamp? | joystick |
Created by:
griffiskr
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