5.1.4 Instructs The Px In RGP Lens Handling

Question 1

RGP lens insertion steps

Answer 1

1. Remove lens from storage case an add one drop of conditioning solution – rub this
   over the lens so both sides are covered
2. Place lens onto index finger pf dominant hand and check that lens is not deposited
   or damages – check edges
3. Hold lower lid down with middle finger of dominant hand and other hand to hold top
   eyelid securely up to prevent blinking
4. Keep looking straight at the lens and bring the lens towards your eye – the lens will
   be positioned towards centre of the eye
5. Let go of bottom eyelid first then your top lid. Blink slowly and gently until lens feels
   more comfortable
6. Repeat for 2nd lens

Question 2

RGP removal steps

Answer 2

RGP Lens Removal
• Always wash hands before removing lenses
Method 1
1. Look straight ahead and press the edge of your lower eyelid against the eyeball
beneath the contact lens
2. Lift your top eyelid above the contact lens and push it down over the eyeball until
the eye is shut
3. The lens should be pushed out and resting between the lashes
Method 2
1. Open your eye as wide as possible
2. Place your finger towards the outer corner of your eye and pull your eyelids tight
towards your ear
3. Blink and the lens should come out

Question 3

RGP lens cleaning

Answer 3

RGP Lens Cleaning
1. Place the lens in the palm of your hand and place 2-3 drops of the cleaner onto the
lens
2. Rub the lens gentle but firmly for approx.. 30 seconds with little finger of other hand
3. Rinse the saline solution to remove the loose depris and any remaining cleaner – rub
the lens between thumb and index finger whilst rinsing with saline
4. Fill the storage case with conditioning solution and place the lens into the correct
side
5. Conditioning solution must be changed on a daily basis
6. Repeat for second lens
7. Leave the lenses to soak overnight in the case

Question 4

Case hygiene

Answer 4

• On insertion of lens discard the solution from the case
• Rinse case with saline and leave to airdry
• Should be replaced with a new one at least every month

Question 5

RGP lens types

Answer 5

• quasar
• ICON

Question 6

Quasar lens details

Answer 6

• aspheric lens from centre to edge
• central are designed to flatten at a much slower rate
• improves contraction characteristic and eliminates any significant aberration over the central 7mm
• edge clearance achieved by addition of second aspheric edge band

Features:
- Exceptional visual performance
- Optimal balance between transmissibility and wettability
- Exceptional comfort
- Improved centration and stability of fit
- Choice of lens materials

Question 7

ICON lens details

Answer 7

• simple to fit and cost effective
• constant edge thickness and constant tear layer profile regardless of lens power
• excellent tear flow
• has spherical design but available in spherical aspheric

Question 8

components to an RGP care regime

Answer 8

1. Cleaning solution – to remove loosely bound foreign matter, cell debris, protein,
   lipids, mucus, cosmetics ect
2. Rinsing solution – to remove daily cleaner, loosened deposits and micro-organisms
   (saline /MPS)
3. Disinfecting solution – physical or chemical process producing destruction of
   pathogenic micro-organisms (kills microbes left on lens including bacteria, viruses,
   fungi, amoeba)
   • Hydrogen peroxide base disinfection – one step e.g. EasySept, uses catalytic disc,
     delayed -release neutralising tablet.
     • Minimum 3 hours in 3% recommended (bacteria 10-15 mins, fungi 1hour,
     acanthamoeba 3-6 hours)
     • Neutralising agents: sodium pyruvate, sodium sulphite, sodium thiosulphate
4. Protein removers (weekly) to aid in removing/loosening tightly bound protein
   deposits – lenses should be cleaned and rinsed after enzymatic treatment
5. Rewetting/lubricating solution - disinfection, wetting and storage. To alleviate
   insufficient lubrication from tear film, rehydrate, flush debris and maintain
   wettability
6. Lens storage case – CL should be stored in a clean case with fresh disinfecting
   solution.
   • Case should be replaced monthly and disinfected weekly (boiled in hot water then
   left to air dry)

Question 9

RGP Solutions

Answer 9

• Delta Plus
• Delta plus conditioning solution
• OTE fine

Question 10

RGP Solutions

Answer 10

• Delta Plus
• Delta plus conditioning solution
• OTE fine

Question 11

Delta plus details

Answer 11

• Disinfecting, soaking and wetting solution
• Contains no abrasive ingredients
• Preservative free
• Contains an optimal blend of anionic and
amphototeric surfactants

Ingredients:
Polyhexanide 0.0001% w/v
EDTA
Sodium phosphates
Poloxamer
Sodium chloride
Water

Question 12

Delta Plus conditioning solution

Answer 12

• Use after cleaning solution
• Disinfects, soaks and rewets the lens
• Contains poloxamer as conditioning/lubricating agent
• Hydrophilic to help comfort on insertion

Question 13

OTE Fine details

Answer 13

• For cleaning, disinfecting, inserting and
storage
• pH neutral
• Removes proteins
• Antibacterial

Ingredients:
Active ingredient – polysorbate 80 ,
HPMC
Preservatives – PHMB 0.0002%

Question 14

Advantages and disadvantages of PMMA

Answer 14

Adv
- good dimensional stability
- less lens flexure
- soft and flexible

Cons
- attracts protein deposits
- not suitable for EW
- decreased wettability