5.1.1.Chooses, fits and orders soft lenses.

Question 1

Range of Soft lenses available, their materials & designs

Daily Spheres

Answer 1

• Serima Sphere (SiH) (Visco Vision - easyvision unique), Linarial (SiH) (Coopervision MyDay), 1 Day Moist (Hydrogel) (J+J)
  
  • Materials:
    
    • Serima - SiH, Linarial - Stenfilcon A (3rd gen), 1 Day Moist - Etafilcon A

Question 2

Range of Soft lenses available, their materials & designs

Daily Torics

Answer 2

• —> Linarial Torics (SiH) (Coopervision MyDay Toric), 1 Day Oasys Astig (SiH), 1 Day Moist Astig (Hydrogel)
  
  • Materials:
    
    • Linarial - Stenfilcon A, 1 Day Oasys Astig - Senofilcon A, 1 Day Moist Astig - Etafilcon A

Question 3

Range of Soft lenses available, their materials & designs

Daily Multifocals

Answer 3

• —> 1 Day Moist Multifocal (Hydrogel), Total 1 Multifocal (SiH - for longer wearing time) (Alcon)
  
  • Materials:
    
    • 1 Day Moist Multi - Etafilcon A, Total 1 Multi - Water gradient; Delefilcon A; Front surface: Aspheric, Back surface: Spherical; Core WC = 33%, Surface WC > 80%
    • Exceptional comfort from low coefficient of friction & high wettability but hard to remove

Question 4

Reusable Spheres

Answer 4

• Opteyes & Opteyes XR (SiH (price sensitive), Uvicia Plus (SiH), Verius (SiH) (Visco Vision - Easyvision Unique)
  
  • Materials:
    
    • Opteyes - Comfilcon A (3rd gen), Uvicia Plus - Fanfilcon A (3rd gen), Verius - SiH

Question 5

Reusable Torics

Answer 5

• Opteyes Toric & Optyeyes Toric XR (Coopervision Bioinfinity) (SiH (price sensitive), Acuvue Oasys Astig, Uvicia Plus Toric (SiH) (Coopervision Avaria Vitality)
  
  • Materials:
    
    • Opteyes - Comfilcon A (3rd gen), Acuvue Oasys Astig - Senofilcon A, Uvicia Plus - Fanfilcon A

Question 6

Reusable Multifocals:

Answer 6

• Opteyes Multifocal – again, because it has a high success rate (as much as any
  multifocal can!)
• Irisian Multifocal (Alcon - air optix) – sometimes useful for older px’s where finger dexterity is an issue, these have quite a stiff modulus being older generation SiH and can be easier to handle. This is a 2nd formulation of a first generation SiH. In the second formulation, it has been surface treated with a plasma coating
• Vusion Multifocal (Coopervision Proclear) – if a hydrogel needs to be used, virtually same design as Opteyes.
• Materials: Opteyes - Comfilcon A, Irisian - Lotrafilcon B, Vusion - Omafilcon B

Question 7

Toric Multifocals

Answer 7

Opteyes Multifocal Toric (new)

Question 8

Lenses for Extended Wear

Answer 8

• Coopervision Bioinfinity
• Acuvue Oasys
• Air Optix Aqua
• Purevision 2??

Question 9

Materials Generally:

Answer 9

• Linarial - Stenfilcon A (3rd gen)
• Acuvue Moist - Etafilcon A (hydrogel)
• Acuvue Oasys - Senofilcon A (2nd gen)
• Uvicia Plus - Fanfilcon A (3rd gen)
• Opteyes - Comafilcon A (3rd gen)

Question 10

3rd Gen SiH:

Answer 10

• Aquaform technology - The advanced silicone channels in the material transport oxygen so efficiently that less raw silicon is required. This sustains inherent wettability and facilitates optimal water content.
  
  • Also means less cross linking so lower modulus. No surface treatment or internal wetting agent – novel polymer
  • Long chain silicone core with hydrophilic groups attached, therefore no surface treatment or wetting agents needed to render surface hydrophilic

Question 11

2nd Gen SiH:

Answer 11

Rely on internal wetting agents to render lens surface hydrophilic

Question 12

1st Gen SiH:

Answer 12

Relies on surface plasma treatment

Question 13

Lectures to read:

Answer 13

Lecture 7 Cl materials
Lecture 9 CL materials

Question 14

Makes Appropriate choice of Lens parameters

Answer 14

Pg 79 of 3rd Student Zone PDF

Question 15

Makes adjustment to lens for best fit

Answer 15

• Steep fit (flatter needed) - Decrease diameter (lower sag) or increase BC
• Flat fit (steeper needed) - Increase diameter (higher sag) or decrease BC
• Generally just change manufacturer

Question 16

Writes order for Soft lens

Answer 16

• Brand
• Name of lens
• BOZR
• TD
• Power

Question 17

How to determine whether a patient is suitable for CL wear?

Answer 17

• Presence of an active eye disease, inflammation or injury such as corneal abrasion.
• Use of medications (including eye drops) that are contraindicated with contact lenses or care solutions e.g. beta blockers
• Allergy to contact lens materials or care solutions.
• Inability to adhere to lens care instructions either due to age, illness, disability or other conditions.
• Inability to insert and remove contact lenses without help.
• History of non-compliance with wearing and replacement schedules as well as lens care instructions.
• Moderate-Severe dryness - chronic blepharitis
• Health conditions such as diabetes (refractive error unstable). Diabetes also increases MK risk
• Pterygium obstructing lens from fitting