First Clinical Impressions on the Integrated Corneal Tomography and Corneal Deformation with Scheimpflug Imaging

Haddad, Jorge Selem; Barnwell, Eliza; Rocha, Karolinne Maia; Waring, George O.; Ambrósio, Renato

doi:10.5005/jp-journals-10025-1151

International Journal of Keratoconus and Ectatic Corneal Diseases

2017

DOI: 10.5005/jp-journals-10025-1151

|View full text |Cite

First Clinical Impressions on the Integrated Corneal Tomography and Corneal Deformation with Scheimpflug Imaging

Jorge Selem Haddad¹,

Eliza Barnwell²,

Karolinne Maia Rocha³

et al.

Abstract: The purpose of this study is to report the preliminary findings and the retrospective clinical impressions of the integrated corneal tomography and corneal deformation parameters with a dynamic ultra-high-speed Scheimpflug camera equipped with a noncontact tonometer. Twelve eyes of six patients were evaluated by the Scheimpflug imaging system of the Pentacam HR and Corvis ST (OCULUS Optikgeräte GmbH, Wetzlar, Germany) devices. The parameters used were the Belin/Ambrósio deviation (BAD-D) and Corvis biomechanic… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2018

2023

Publication Types

Select...

Article3

Relationship

Self Cite0

Independent3

Authors

Journals

Cited by 3 publications

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

The false positive rates for detecting keratoconus and potential ectatic corneal conditions when evaluating astigmatic eyes with Scheimpflug Technology

Henríquez¹,

Hadid²,

Moctezuma³

et al. 2022

European Journal of Ophthalmology

View full text Add to dashboard Cite

Purpose To quantify the false positive rates for keratoconus (KC) and potential ectatic corneal conditions in highly astigmatism eyes when using published parameters/indices obtained from the Pentacam and Galilei units. Setting Oftalmosalud Instituto de Ojos, Lima, Peru. Design Prospective cohort study. Methods 67 consecutive eyes with corneal astigmatism > 1.5 D, with a minimum follow ups of 36 months after an uneventful LASIK procedure were included. Indices for KC and other potential ectatic corneal conditions (subclinical KC, forme fruste KC, suspect KC) were obtained using the Pentacam and Galilei Scheimpflug cameras. Main outcome measures The false positive rates for KC and potential ectatic corneal conditions were measured. Cut off values provided by previous studies and company-based parameters were used to assess the rate of false positivity. Results The range of false positive rates for a KC diagnosis depending on the lowest and highest cutoff values were: index of height decentration (61% - 1%), index of surface variance (76% - 0%), Posterior elevation (55% - 0%), maximum Ambrosio Relational thickness (100% - 13%), Belin Ambrosio enhanced ectasia display total deviation value (100% - 4%), Average pachymetric progression index (69% - 3%), Pachymetry at the thinnest point (58% - 1%), CSI Center Surround Index (100%), Differential sector index (51%). Conclusion The false positive rates for KC and ectatic corneal conditions vary dramatically depending on the cut-off values used. Some indexes used for diagnosis of potential ectatic corneal conditions are inaccurate in normal, highly astigmatic eyes.

show abstract

The false positive rates for detecting keratoconus and potential ectatic corneal conditions when evaluating astigmatic eyes with Scheimpflug Technology

Henríquez¹,

Hadid²,

Moctezuma³

et al. 2022

European Journal of Ophthalmology

View full text Add to dashboard Cite

show abstract

Pentacam findings after implantation of intrastromal corneal rings in keratoconus

Shaltout,

Elsedfy,

Awade

et al. 2023

Journal of Current Medical Research and Practice

View full text Add to dashboard Cite

Introduction Intrastromal corneal ring segment implantation is a minimally invasive procedure. Its main goals are to flatten and regularize the cornea, to improve uncorrected and corrected visual acuity, and to delay or even prevent a keratoplasty. ICRSs effect correlates directly to its thickness and inversely to its distance to the visual axis. Patients and methods A retrospective observational study involving 44 eyes of 44 patients was initiated. The files and pentacam printouts of 44 patients were retrospectively extracted and evaluated. The preoperative and postoperative ocular findings and pentacam parameters of anterior and posterior corneal surfaces, in addition to the pachymetry data, were recorded and analyzed. Results Forty-four patients with keratoconus were evaluated in this study. Evaluation of anterior corneal surface showed significant flattening of all keratometry readings (P < 0.001) with significant improvement of corneal astigmatism (P = 0.03), corneal asphercity (P < 0.001), the inferior-superior asymmetry (P = 0.019) and the front elevation (P = 0.005) The posterior corneal surface showed significant improvement in back elevation (P < 0.001), and the back surface asphercity showed significant prolate shift (P = 0.01). The thinnest location was significantly upward displaced towards the corneal apex. kera 355° showed a significant flattening of all keratometry readings with significant improvement of corneal astigmatism and corneal asphercity of the anterior corneal surface and the back surface asphercity showed significant prolate shift (P = 0.001). The ICRS showed a significant flattening of km (P = 0.030) and corneal asphercity of the anterior corneal surface (P = 0.046). Conclusion The intracorneal ring implantation led to improvement of the tomographic corneal parameters which was more significant at the anterior corneal surface.

show abstract

Paradigms, Paradoxes, and Controversies on Keratoconus and Corneal Ectatic Diseases

Salomão¹,

Lopes²,

Ambrósio³

et al. 2018

International Journal of Keratoconus and Ectatic Corneal Diseases

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

First Clinical Impressions on the Integrated Corneal Tomography and Corneal Deformation with Scheimpflug Imaging

Cited by 3 publications

References 21 publications

The false positive rates for detecting keratoconus and potential ectatic corneal conditions when evaluating astigmatic eyes with Scheimpflug Technology

The false positive rates for detecting keratoconus and potential ectatic corneal conditions when evaluating astigmatic eyes with Scheimpflug Technology

Pentacam findings after implantation of intrastromal corneal rings in keratoconus

Paradigms, Paradoxes, and Controversies on Keratoconus and Corneal Ectatic Diseases

Contact Info

Product

Resources

About