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Summary Soft toric contact lenses £10.49
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Summary

Summary Soft toric contact lenses

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Toric contact lenses notes

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  • March 2, 2023
  • 6
  • 2022/2023
  • Summary
All documents for this subject (20)
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shoaib991
Soft Contact Lens Toric
Lens Design

 Toric back surface with spherical front
 Toric Front with spherical back
 Wraps on Cornea so neg tear lens
 Ocular astigmatism corrected due to incorporation of cyl

Characteristics

 Method of stabalisation
- Truncation
- Prism ballast
- Dynamic staballisation
- Toric back surface

, Fit PRISM TRUNCATION PERI – DOUBLE
BALLAST BALLAST SLAB OFF
Base 1 to 1.5 base Aligned with Uses Thin zone
down lower lid thickness as superior and
margin the inferior
stabilizing
component,
creating base
down effect
Stabilization By prism- Some Thinner Lid forces
induced CL stabilization Superiorly maintain
thickness and thicker orientation
(thicker inferiorly
inferior) Overall thin
Similar to
prism ballast
Disadvantage Lower O2 Discomfort Increase in Can exhibit
Transmilibilit discomfort reduced
y Not always with lid rotational
successful Interaction stability if
Discomfort lower sph
with lid More px visit Reduced O2 WTR astig
interaction in thicker

Acclerated stabilization Design

 Thin zone superiorly and inferiorly
 Four active zones added thickenss located in mid periphery of the lens

*DESIGNED TO ACTIVE ROTATE UPOON BLINK WHENEVER IT IS
MISORIENTATED AND HELD STABLE WHEN THE LENS IS CORRECTLY ALIGNED*

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