5.1.1.Chooses, fits and orders soft lenses. Flashcards
1
Q
Range of Soft lenses available, their materials & designs
Daily Spheres
A
- 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
- Materials:
2
Q
Range of Soft lenses available, their materials & designs
Daily Torics
A
- —> 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
- Materials:
3
Q
Range of Soft lenses available, their materials & designs
Daily Multifocals
A
- —> 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
- Materials:
4
Q
Reusable Spheres
A
- 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
- Materials:
5
Q
Reusable Torics
A
- 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
- Materials:
6
Q
Reusable Multifocals:
A
- 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
7
Q
Toric Multifocals
A
Opteyes Multifocal Toric (new)
8
Q
Lenses for Extended Wear
A
- Coopervision Bioinfinity
- Acuvue Oasys
- Air Optix Aqua
- Purevision 2??
9
Q
Materials Generally:
A
- 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)
10
Q
3rd Gen SiH:
A
- 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
11
Q
2nd Gen SiH:
A
Rely on internal wetting agents to render lens surface hydrophilic
12
Q
1st Gen SiH:
A
Relies on surface plasma treatment
13
Q
Lectures to read:
A
Lecture 7 Cl materials
Lecture 9 CL materials
14
Q
Makes Appropriate choice of Lens parameters
A
Pg 79 of 3rd Student Zone PDF
15
Q
Makes adjustment to lens for best fit
A
- 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
