September 2020
Volume 9, Issue 10
Open Access
Letters to the Editor  |   September 2020
Letter to the Editor: The Implications of an Ab Interno Versus Ab Externo Surgical Approach on Outflow Resistance of a Subconjunctival Drainage Device for Intraocular Pressure Control
Author Affiliations
Translational Vision Science & Technology September 2020, Vol.9, 17. doi:https://doi.org/10.1167/tvst.9.10.17
  • Views
  • PDF
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Laszlo Romoda; Letter to the Editor: The Implications of an Ab Interno Versus Ab Externo Surgical Approach on Outflow Resistance of a Subconjunctival Drainage Device for Intraocular Pressure Control. Trans. Vis. Sci. Tech. 2020;9(10):17. doi: https://doi.org/10.1167/tvst.9.10.17.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
We read with interest the article titled “The Implications of an Ab Interno Versus Ab Externo Surgical Approach on Outflow Resistance of a Subconjunctival Drainage Device for Intraocular Pressure Control” by Lee et al.,1 the subsequent critical response to the article by Sheybani, Grover, and Fellman2 and the reply from the authors of the article.3 
Allergan R&D would like to correct the assertion in the response from the authors that the origin of the pressure drop variability between the findings of Sheybani et al. and Lee et al. are due to manufacturing variability of the internal diameter of the XEN implant, as stated by Lee et al. 
XEN products are designed to provide safe, effective pressure drop to treat glaucoma. The manufacturing process yields far tighter control over pressure drop than the assertion implies. Furthermore, the XEN numerical product designation is not meant to be a product specification nor indication of manufacturing tolerance. Therefore, calculating expected pressure drop from the product name will not result in a meaningful value. 
Additionally, we would greatly appreciate it if you could ensure that this explanation travel with the manuscript as is customary. 
References
Lee RMH, Bouremel Y, Eames I, Brocchini S, Khaw PT. The implications of an Ab interno versus Ab externo surgical approach on outflow resistance of a subconjunctival drainage device for intraocular pressure control. Transl Vis Sci Technol. 2019; 8: 58. [CrossRef] [PubMed]
Sheybani A, Grover D, Fellman R. Critical response to ab interno versus ab externo surgical approach on outflow resistance of a subconjunctival drainage device. Transl Vis Sci Technol. 2020; 9: 14. [CrossRef] [PubMed]
Lee RMH, Bouremel Y, Eames I, Brocchini S, Khaw PT. Author response: ab interno versus ab externo surgical approach on outflow resistance of a subconjunctival drainage device. Transl Vis Sci Technol. 2020; 9: 15. [CrossRef] [PubMed]
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×