Week 5 - Quiz Revision

Question 1

What is the primary purpose of handling tints in contact lenses?

Answer 1

to make lenses easier to locate during handling

Question 2

Cosmetic tinted lenses are primarily used for………

Answer 2

enhancing or changing the eye’s colour

Question 3

Which type of tinted lens is used to mask corneal scarring or to make a disfigured eye appear more typical?

Answer 3

prosthetic tint

Question 4

Performance-enhanced tinted lenses, such as X-chrome lenses, are used to…….

Answer 4

enhance color vision in color-deficient patients

Question 5

Who would be an ideal candidate for prophylactic tinted lenses?

Answer 5

patients exposed to intense sunlight/UV

Question 6

Which type of tinted lens is often hand-painted for custom theatrical effects?

Answer 6

theatrical tint

Question 7

Therapeutic tinted lenses are primarily designed to……….

Answer 7

treat underlying defects or diseases

Question 8

Which condition could benefit from therapeutic tinted lenses to reduce photophobia?

Answer 8

achromatopsia

Question 9

What is a key characteristic of prosthetic tinted lenses for non - sighted eyes?

Answer 9

they have a painted iris and opaque pupil

Question 10

A tinted contact lens can improve vision in low light conditions. T/F

Answer 10

FALSE

Question 11

What condition is associated with reduced oxygen supply to the cornea in extended wear cls?

Answer 11

Corneal Hypoxia

Question 12

What symptom should patients monitor for as an early sign of potential cl complications?

Answer 12

sensitivity to light

Question 13

How is flexible wear best described?

Answer 13

intermittent use of cls overnight and during sleep

Question 14

What is the primary advantage of frequent replacement lenses in extended wear?

Answer 14

reduced exposure to accmulated protein deposits

Question 15

Which adverse effect is specifically associated with the use of higher modulus, first-generation silicone hydrogel lenses in extended wear?

Answer 15

unwanted orthokeratology

Question 16

What is a common ocular response when a patient first wears RGPs lenses?

Answer 16

narrowing of the palpebral aperture

Question 17

What is the preferred type of lens for patients with severe drye eyes?

Answer 17

scleral lenses

Question 18

Which condition is a medical indication for cl usage?

Answer 18

keratoconus

Question 19

What are two common contraindication for cl wear?

Answer 19

poor hygiene and compliance

Question 20

What should a px do if they experience difficulty removing their cls after showering?

Answer 20

use artificial tears and keep the eyes closed for one minute before trying again

Question 21

If a px presents with bilateral superficial punctate keratitis (SPK) and mild irritation at their one - month follow up, what is the most likely cause?

Answer 21

solution sensitivity

Question 22

What type of cl is often best for correcting corneal irregularities?

Answer 22

RGP lenses

Question 23

Which of the following is NOT a recommended action for a patient experiencing non-wetting of a rigid lens?

1-increase the lens replacement frequency
2- polish the lens to remove deposits
3- use protein-removing agents
4-stop wearing cls permanently

Answer 23

4- stop wearing cls permanently

Question 24

Which environmental condition might contraindicate cl use?

Answer 24

working in a lab with chemical fumes

Question 25

What is the primary function of a scleral lens?

Answer 25

To create a tear-filled vault over the cornea

Question 26

What materials are commonly used for scleral lenses to ensure high oxygen permeability? 2

Answer 26

Acuity 200 Boston X02

Question 27

What cl is designed to deliver medication directly to the eye's surface?

Answer 27

Medicated lenses

Question 28

In fitting of multifocal cls which factor is crucial for successful adaptaion?

Answer 28

pupil size

Question 29

What is a primary consideration when using distance powered cls with reading glasses for presbyopia?

Answer 29

they should be used intermittently rather than continously

Question 30

What should be checked to ensure a well-fitting scleral lens? 2

Answer 30

movement and rotation of the lens

Question 31

What is a popular substance found in preservatives?

Answer 31

isopropyl (alochol)

Question 32

What does isopropyl do to a cls?

Answer 32

dry out the cls

Question 33

Preservative free saline is the best option for lens storage overnight. T/F

Answer 33

FALSE

Question 34

The purpose of therapeutic lens is to help normalize an abnormal appearance of the eye. T/F

Answer 34

FALSE

Question 35

Therapeutic lenses can help with recurring erosion of the cornea. T/F

Answer 35

TRUE

Question 36

Silicon rubber lenses are used to treat and correct for keratoconus. T/F

Answer 36

FALSE

Question 37

What is the purpose of sequestering agents?

Answer 37

remove protein of a contact lens

Question 38

Dyslexia can be fixed by therapeutic application of a prophylactic tint. T/F

Answer 38

FALSE

Question 39

SPK is a sign of solution toxicity?

Answer 39

YES

Question 40

Hydrogen peroxide must be neutralized before the cls is clean and ready for use. T/F

Answer 40

TRUE

Question 41

What are the 2 methods used for disinfection of a contact lens?

Answer 41

Heat Chemical (cold)

Question 42

Which lens wearing modalitys are most likely to cause hypoxia? 3

Answer 42

Extended wear continous wear lenses that are slept in

Question 43

A coloured lens can alter surface chemistry of the lens causing the lens to be more dry. T/F

Answer 43

TRUE

Question 44

A contact lens can be used to correct vision in patients with nystagmus. T/F

Answer 44

TRUE

Question 45

What is the name of the tinted lens designed to enhance performance by enhancing contrast for athletes?

Answer 45

Performance enhancing tinted lens (X Chrom)

Question 46

What is fenstration?

Answer 46

Hole drilled in lens

Question 47

What agents in solution restricts growth of microorganisms?

Answer 47

preservatives

Question 48

What is the purpose of a prophylactic lenses?

Answer 48

prevent injury or disease of the eye

Question 49

What does the viscosity agent in solutions do?

Answer 49

improves the wetting time and comfort of the solution

Question 50

What type of lens show be used for someone suffering with recurrent corneal erosions?

Answer 50

Bandage lens

Question 51

What does 'three point touch' refer to?

Answer 51

Touch at the corneal apex with lens bearing pressure residing on the peripheral cornea

Question 52

Acanthamoeba is a preservative found in solutions. T/F

Answer 52

FALSE

Question 53

What condition can be caused by a steep fitting scleral lens?

Answer 53

Blanching

Question 54

A contact lens wearer who reacts to preservatives will benefit from using the hydrogen peroxide system. T/F

Answer 54

TRUE

Question 55

Prosthetic tinted lenses is used to change the eye color for cosmetic purposes or for fun. T/F

Answer 55

FALSE

Question 56

A nevus can be caused by a toxic reaction to hydrogen peroxide solution. T/F

Answer 56

FALSE

Question 57

Wearing EW lens can cause the epithelial cells to change. T/F

Answer 57

TRUE