intro and history Flashcards

Question

What type of treatment can improve wettability?

Answer 1

plasma treatment (super cleaning)

Answer 2

• Plasma cleaning • Ionized gas (oxygen) • Around room temperature • Plasma interacts with any surface • Plasma’s UV energy is very effective in the breaking organic bonds • Super cleaning—lasts a few days to months

Answer 3

Mucin, lipids, lactoferrin, lysozyme

Answer 4

* Are deemed to be low to moderate risk * Subject to the least regulatory controls * Example: dental floss

Answer 5

• Are moderate to high risk • Require greater regulatory controls to provide reasonable assurance of the device’s safety and effectiveness • General controls and special controls • Examples • Contact lenses worn during daytime (soft, GP, care products) ex: condoms

Answer 6

* Are high risk * Most stringent regulatory controls * General controls and pre-market approval (PMA) * Examples * Extended wear contact lenses * Overnight orthokeratology lenses

Answer 7

• All prescriptions for corrective lenses must be released to patients, whether requested or not

Answer 8

• Eyeglass prescriptions must be given to the patient | immediately following the eye exam

Answer 9

• Contact lens prescriptions must be given to the patient immediately upon completion of the eye exam or the contact lens fitting (if a fitting is necessary) • Contact lens fitting means the process that begins after an initial eye examination for contact lenses and ends when a successful fit has been achieved • In cases of renewal prescriptions, the fitting ends when the prescriber determines that no change in the existing prescription is required

Answer 10

• Requires a valid contact lens prescription include • Power, material or manufacturer or both, base curve or appropriate designation, diameter (when appropriate), and an appropriate expiration date • The prescription should also include • Patients name • Optometrists name, address, telephone number, license number, and signature

Answer 11

should ask for information about your doctor so they may verify the prescription with the doctor • California law requires them to do this if they don’t have a copy of the written prescription • If the company does not ask for this information, they are not complying with state law

Answer 12

• In exchange for a copy of the contact lens prescription, prescribers CANNOT require patients to • Buy contact lenses • Pay additional fees • Sign a waiver or release

Answer 13

* If a patient elects to purchase contact lenses from a third party, the seller must verify the prescription before filling it * When requested, optometrists are required to respond to sellers’ requests for prescription verification within eight business hours * ‘passive verification’

Answer 14

• More detailed prescriptions will include directions for safe use such as • Wearing schedule • Whether the lenses are for daily or extended wear • Number of refills • Whether lens material substitutions are allowed

Answer 15

• More detailed prescriptions will include directions for safe use such as • Wearing schedule • Whether the lenses are for daily or extended wear • Number of refills • Whether lens material substitutions are allowed

Answer 16

lenses are inside out theoretically: we can find this in: keratoconus (associated in myopia, not +2.00 lens) or irregular astigmatism (should be fit with GP CLs)

Answer 17

Lens flexure

Answer 18

cornea is considered a single surface

Answer 19

If Rx is 10.00 D, then the power change will be 1 D change either more or less depending

Answer 20

intense surface cleaning