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Contact Lens Theory > Week 5 - Contact Lens Solution > Flashcards

Week 5 - Contact Lens Solution Flashcards

1
Q

What are the advantages to Hydrogen Peroxide Systems? 4

A
  • No preservatives
  • Efficient
  • Enhances cleaning
  • Prolongs lens life
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2
Q

What are the disadvantages to Hydrogen Peroxide Systems? 3

A
  • Takes time to be neutralized
  • Compliance
  • Need to use MPS (multi purpose solutions) also for
    intermittent wearers
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3
Q

What is the primary functions of soft multipurpose solutions? 4

A
  • Rinse
  • Disinfect
  • Clean
  • Store
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4
Q

All Soft Multipurpose solutions are ‘rub’ solutions and contain preservatives.

What lenses are they used on only?

A

Reusable lenses - lenses must be rubbed to cleaned properly

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5
Q

What is a common hydrogen peroxide brand for soft contact lenses?

A

clear care/ clear care plus

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6
Q

What type of solution are the following:
-Biotrue/Biotrue
Advance,
-Opti-free Pure moist,
-Solocare,
-Menicare Soft

A

multi purpose soutions (MPS) for soft contact lenses

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7
Q

What are common extra strength cleaner brand for soft contact lenses? 2

A

-B&L Daily cleaner for soft lens,
-Miraflow(LensFresh) (alcohol based)

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8
Q

What is a common 2-step system brand for hard contact lenses?

A

Boston Advance Cleaner with conditioning fluid

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9
Q

What is a common multipurpose solutions brand for hard contact lenses?

A

Boston Simplus

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10
Q

What are common extra strength cleaner brand for hard contact lenses? 2

A

-X-Stat II,
-Miraflow(LensFresh)

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11
Q

How long can you leave contact lenses in a hydrogen peroxide before rewearing?

A

up to 7 days - if longer reclean and let sit for 6 hrs before wearing

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11
Q

What are common protein remover brand for hard contact lenses? 2

A

-Boston one step,
-Menicon Progent Cleaner

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12
Q

How long does it take hydrogen peroxide to neutralize, therefore okay to wear?

A

6 hrs

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13
Q

What can happen to a contact lens case if we dont replace it often enough?

A

Biofilm will form on the case which reduces the effect of the disenfectant (hydorgen peroxide etc)

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14
Q

What is a the MAIN/MAJOR advantage of hydrogen peroxide contact lens cleaning systems?

A

they are preservative free

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15
Q

Why are hydrogen peroxide systems suitable for patients with sensitive eyes?

A

they are preservative free so less chance of allergic reactions

16
Q

What is a significant disadvantage to using hydrogen peroxide systems?

A

They require six hours to disinfect the lenses

17
Q

Saline solution is NOT a lens disinfectant, it is used only as a rinsing solution for GP and SOFT lenses. T/F

Is saline solution available in preserved and preservative free options?

A

TRUE

YES

18
Q

Not all eye drops are made the same.

What common rewetting solutions are there? 5

A

-Blink Contacts,
-Refresh Relieva,
-Systane Ultra,
-Systane Ultra Hydration Preservative Free,
-Hylo

19
Q

We should not reccommend vasoconstrictors like Visine, NavconA, Lumify.
Why?

A

extended use of this products can cause pathological issues

20
Q

What are 6 general ingredients in a contact lens solution?

A

Buffers
Preservatives
Cleaning agent
Tonicity agents
Viscosity Agents
Wetting Agents

21
Q

What is the purpose of buffers in a CL solution?

A

keep PH of the solution close to natural tears
Examples: borate, phosphate, nitrate

22
Q

What is the purpose of a preservatives in a CL solution? 2

A

-restricts the growth of microorganisms
-solution sterility in bottle ex. Isopropyl

23
Q

What are cleaning agents also known as and what can they be added to? 2

A

– known as a surfactant cleaner
– this can be added
to MPS or can be a stand alone agent

24
Q

What is the purpose of tonicity agents in a CL solution?

A

adjust the salt concentration to ensure compatibility with tears

25
Q

What is the purpose of viscosity agents in a CL solution?

A

improves the wetting time and comfort of the solution

26
Q

What is the purpose of wetting agents in a CL solution?

A

helps the solution spread across the lens surface

27
Q

What are the 2 main reasons we clean a lens before setting it to disinfect?

A

-to get rid of debris that can adhere to the lenses and cause problems
-cleaning first enhances/ improves effectiveness of the disinfection process

28
Q

What happens if the lenses are left dry? 2

A

-the lens becomes warped
-the BOZR will become too steep

29
Q

After rubbing the lenses how long should you rinse the lenses for when cleaning with a multipurpose solution?

A

5 seconds

29
Q

How long do you rub the lenses on both side for with a multipurpose solution?

A

20 seconds

30
Q

How long do CLs need to sit in a multi purpose solutions to disinfect for?

A

4 hours

Contact Lens Theory (27 decks)

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