Podcast
Questions and Answers
What is the primary reason for using a trial set in complex fitting?
What is the primary reason for using a trial set in complex fitting?
- To compare the total astigmatism present in the ocular Rx
- To measure the corneal astigmatism present
- To fit specialist keratoconus designs (correct)
- To achieve a spherical RGP with mainly corneal astigmatism
What is the typical size of the Total Diameter (Td) in RGP lenses?
What is the typical size of the Total Diameter (Td) in RGP lenses?
- 11-12mm
- 10-11mm
- 8-9mm
- 9-10mm (correct)
What is the purpose of measuring the Horizontal Visible Iris Diameter (HVID)?
What is the purpose of measuring the Horizontal Visible Iris Diameter (HVID)?
- To calculate the corneal astigmatism present
- To set the total diameter of the lens (correct)
- To determine the BOZD of the RGP lens
- To assess the lid interaction with the lens
What is the advantage of using a large lens diameter?
What is the advantage of using a large lens diameter?
What is the rule of thumb for calculating the corneal astigmatism from K readings?
What is the rule of thumb for calculating the corneal astigmatism from K readings?
What is the primary reason for using a smaller Total Diameter (Td) in RGP lenses?
What is the primary reason for using a smaller Total Diameter (Td) in RGP lenses?
What is the purpose of converting the Spectacle Rx into Ocular Rx?
What is the purpose of converting the Spectacle Rx into Ocular Rx?
What is the primary advantage of using Hybrid FS and Hybrid FS Plus lenses?
What is the primary advantage of using Hybrid FS and Hybrid FS Plus lenses?
What is the primary disadvantage of using small diameter lenses?
What is the primary disadvantage of using small diameter lenses?
What is the purpose of calculating the corneal astigmatism from K readings?
What is the purpose of calculating the corneal astigmatism from K readings?
What is an advantage of RGP lenses in terms of vision?
What is an advantage of RGP lenses in terms of vision?
What is a disadvantage of RGP lenses in terms of cost?
What is a disadvantage of RGP lenses in terms of cost?
What is a benefit of RGP lenses for presbyopes?
What is a benefit of RGP lenses for presbyopes?
What is a common replacement interval for RGP lenses?
What is a common replacement interval for RGP lenses?
What is an important factor to consider when selecting an RGP material?
What is an important factor to consider when selecting an RGP material?
What is a disadvantage of RGP lenses in terms of patient comfort?
What is a disadvantage of RGP lenses in terms of patient comfort?
What is a benefit of RGP lenses for patients with irregular corneas?
What is a benefit of RGP lenses for patients with irregular corneas?
What is a potential issue with RGP lenses in terms of corneal molding?
What is a potential issue with RGP lenses in terms of corneal molding?
What is a potential complication of prolonged RGP lens use?
What is a potential complication of prolonged RGP lens use?
What is a factor to consider when deciding what to order for a patient?
What is a factor to consider when deciding what to order for a patient?
What is the primary reason for ensuring alignment fit in RGP lenses?
What is the primary reason for ensuring alignment fit in RGP lenses?
What is a characteristic of Fluorosilicone Acrylates (FSAs) compared to Silicone Acrylates (SAs)?
What is a characteristic of Fluorosilicone Acrylates (FSAs) compared to Silicone Acrylates (SAs)?
What is the typical range of total astigmatism present in the BVD-corrected ocular Rx that can be corrected with a spherical RGP lens?
What is the typical range of total astigmatism present in the BVD-corrected ocular Rx that can be corrected with a spherical RGP lens?
What is the purpose of measuring the Vertical Palpebral Aperture (VPA)?
What is the purpose of measuring the Vertical Palpebral Aperture (VPA)?
Which type of RGP material is more prone to deposits and has a higher scratching surface?
Which type of RGP material is more prone to deposits and has a higher scratching surface?
What is the primary reason for using a large Total Diameter (Td) in RGP lenses?
What is the primary reason for using a large Total Diameter (Td) in RGP lenses?
What is the primary advantage of RGP lenses in terms of contrast reduction for presbyopes?
What is the primary advantage of RGP lenses in terms of contrast reduction for presbyopes?
What is the purpose of converting the Spectacle Rx into Ocular Rx for EACH meridian?
What is the purpose of converting the Spectacle Rx into Ocular Rx for EACH meridian?
What is a benefit of using a hybrid lens, such as Hybrid FS or Hybrid FS Plus?
What is a benefit of using a hybrid lens, such as Hybrid FS or Hybrid FS Plus?
What is the main reason why modern soft contact lenses cause limited neovascularisation?
What is the main reason why modern soft contact lenses cause limited neovascularisation?
What is the purpose of measuring the Horizontal Visible Iris Diameter (HVID)?
What is the purpose of measuring the Horizontal Visible Iris Diameter (HVID)?
What is the primary factor to consider when deciding the replacement interval for RGP lenses?
What is the primary factor to consider when deciding the replacement interval for RGP lenses?
What is a potential issue with using small diameter lenses?
What is a potential issue with using small diameter lenses?
What is the primary advantage of using RGP lenses for patients with irregular corneas?
What is the primary advantage of using RGP lenses for patients with irregular corneas?
What is the primary reason why RGP lenses are not suitable for extended wear?
What is the primary reason why RGP lenses are not suitable for extended wear?
What is the primary benefit of using RGP lenses in terms of cost?
What is the primary benefit of using RGP lenses in terms of cost?
What is the primary factor to consider when selecting an RGP material?
What is the primary factor to consider when selecting an RGP material?
What is the primary disadvantage of RGP lenses in terms of care?
What is the primary disadvantage of RGP lenses in terms of care?
What is the primary benefit of using RGP lenses for patients who want to wear their lenses daily?
What is the primary benefit of using RGP lenses for patients who want to wear their lenses daily?
What is the primary reason why RGP lenses may not be suitable for patients with certain occupations?
What is the primary reason why RGP lenses may not be suitable for patients with certain occupations?
