Podcast
Questions and Answers
How have advancements in toric soft lens design sought to improve orientation and stability characteristics?
How have advancements in toric soft lens design sought to improve orientation and stability characteristics?
- By reducing thickness variations
- By increasing thickness variations (correct)
- By decreasing oxygen availability
- By introducing silicone hydrogel materials
What was the main issue revealed by a recent wearer survey regarding toric lenses?
What was the main issue revealed by a recent wearer survey regarding toric lenses?
- Lack of advanced designs in the market
- Inadequate oxygen availability
- Low durability of toric lenses
- Poor lens performance in terms of comfort and vision (correct)
What percentage of the ametropic population has 0.75D or more of refractive astigmatism?
What percentage of the ametropic population has 0.75D or more of refractive astigmatism?
- Less than 10%
- Around 5%
- Nearly 50%
- Approximately 30% (correct)
What do Rigid Gas Permeable (RGP) lenses correct?
What do Rigid Gas Permeable (RGP) lenses correct?
Which type of lenses are now available in silicone hydrogel materials according to the text?
Which type of lenses are now available in silicone hydrogel materials according to the text?
What percentage of prescriptions have more than 1.00DC of astigmatism based on the information provided?
What percentage of prescriptions have more than 1.00DC of astigmatism based on the information provided?
What should be done if the lens rotates to the left?
What should be done if the lens rotates to the left?
How should the axis be adjusted if the lens rotates clockwise?
How should the axis be adjusted if the lens rotates clockwise?
What is the consequence of a toric soft lens being 20 degrees off-axis?
What is the consequence of a toric soft lens being 20 degrees off-axis?
Why is a spherical over-refraction carried out for a toric soft lens?
Why is a spherical over-refraction carried out for a toric soft lens?
What indicates that the lens fit is adequate?
What indicates that the lens fit is adequate?
Why should a new trial lens be inserted after compensating for cylinder axis rotation?
Why should a new trial lens be inserted after compensating for cylinder axis rotation?
Why is maintaining the rotational stability of a soft toric lens crucial?
Why is maintaining the rotational stability of a soft toric lens crucial?
What is a key difference between a rigid toric lens and a soft toric lens?
What is a key difference between a rigid toric lens and a soft toric lens?
What is the purpose of empirical fitting in the context of contact lenses?
What is the purpose of empirical fitting in the context of contact lenses?
Why is it important for soft toric lenses to maintain stability during lateral eye movements?
Why is it important for soft toric lenses to maintain stability during lateral eye movements?
What feature of a soft toric lens allows it to fit spherical corneas effectively?
What feature of a soft toric lens allows it to fit spherical corneas effectively?
In soft toric fitting, what determines the success of optical correction?
In soft toric fitting, what determines the success of optical correction?
What is one of the reasons for poor vision that can occur due to axis rotation?
What is one of the reasons for poor vision that can occur due to axis rotation?
How can the problem of axis rotation leading to poor vision be avoided?
How can the problem of axis rotation leading to poor vision be avoided?
What does Figure 8 in the text suggest for dealing with poor visual acuity?
What does Figure 8 in the text suggest for dealing with poor visual acuity?
If a lens is rotationally stable but with a mislocated axis, what action should the practitioner take according to the text?
If a lens is rotationally stable but with a mislocated axis, what action should the practitioner take according to the text?
What is recommended if a soft toric lens is rotationally unstable?
What is recommended if a soft toric lens is rotationally unstable?
What role does a sphere/cyl over-refraction play in determining poor visual acuity causes according to the text?
What role does a sphere/cyl over-refraction play in determining poor visual acuity causes according to the text?
What type of lenses were found to be ineffective for correcting low levels of astigmatism?
What type of lenses were found to be ineffective for correcting low levels of astigmatism?
Which publication discusses a new daily wear silicone hydrogel lens for astigmatism?
Which publication discusses a new daily wear silicone hydrogel lens for astigmatism?
In which study was a clinical evaluation done on factors influencing toric soft contact lens fit?
In which study was a clinical evaluation done on factors influencing toric soft contact lens fit?
Which publication provides a systematic approach to problem-solving with soft toric contact lenses?
Which publication provides a systematic approach to problem-solving with soft toric contact lenses?
Which study involved a clinical comparison of two soft toric contact lenses?
Which study involved a clinical comparison of two soft toric contact lenses?
Which publication introduced a new dual-thin zone disposable toric lens?
Which publication introduced a new dual-thin zone disposable toric lens?
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