Changes in anterior and posterior corneal parameters in patients with keratoconus after intrastromal corneal-ring segment implantation

Chang Rae Rho; Kyung Sun Na; Young Sik Yoo; Chitra Pandey; Chang Won Park; Choun Ki Joo

doi:10.3109/02713683.2013.788723

Changes in anterior and posterior corneal parameters in patients with keratoconus after intrastromal corneal-ring segment implantation

Chang Rae Rho, Kyung Sun Na, Young Sik Yoo, Chitra Pandey, Chang Won Park, Choun Ki Joo

Department of Ophthalmology

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Purpose: To compare changes in the anterior and the posterior corneal parameters and the anterior chamber depth (ACD) measured by a rotating Scheimpflug camera and scanning-slit topography before and after intrastromal corneal ring segment (ICRS) implantation. Methods: Twenty-five eyes of 21 keratoconus patients who had Intacs (Addition Technology, Sunnyvale, CA) ICRS implantation were included. The anterior segment parameters of the participants were measured before and 3 months after Intacs ICRS implantation with a rotating Scheimpflug camera and scanning-slit topography. Outcome measures included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction and corneal topography. Results: The UDVA improved in 21 eyes (84%) and CDVA in 18 eyes (72%). The anterior average keratometry decreased from 51.80 D preoperatively to 49.59 D postoperatively (p<0.001) using the rotating Scheimpflug camera and Sim K decreased from 51.21 to 47.44 D using the scanning-slit topography. The posterior average keratometry decreased from -8.03 D preoperatively to -8.42 D postoperatively (p<0.001) using the rotating Scheimpflug camera. ACD decreased from 3.44 to 3.32mm (p<0.001) and from 3.28 to 3.19mm (p < 0.001) using the rotating Scheimpflug camera and scanning-slit topography, respectively. Conclusions: The implantation of Intacs segments induced corneal flattening of the anterior surface and corneal steepening of the posterior surface. Both anterior corneal flattening and posterior corneal steepening contributed to the decrease in the keratometric power.

Original language	English
Pages (from-to)	843-850
Number of pages	8
Journal	Current Eye Research
Volume	38
Issue number	8
DOIs	https://doi.org/10.3109/02713683.2013.788723
State	Published - Aug 2013

Bibliographical note

Funding Information:
This work was supported by the Industrial Strategic Technology Development Program (10040121, Development of high-speed OCT assisted femtosecond laser disruption system for ocular anterior segment surgery) funded by the Ministry of Knowledge Economy (MKE, Korea).

Keywords

Anterior chamber depth
Corneal topography
Intrastromal ring segment implantation
Keratoconus
Keratometry

Access to Document

10.3109/02713683.2013.788723

Cite this

@article{cf072bd28dcd4aa1bc94dc99d8c46171,

title = "Changes in anterior and posterior corneal parameters in patients with keratoconus after intrastromal corneal-ring segment implantation",

abstract = "Purpose: To compare changes in the anterior and the posterior corneal parameters and the anterior chamber depth (ACD) measured by a rotating Scheimpflug camera and scanning-slit topography before and after intrastromal corneal ring segment (ICRS) implantation. Methods: Twenty-five eyes of 21 keratoconus patients who had Intacs (Addition Technology, Sunnyvale, CA) ICRS implantation were included. The anterior segment parameters of the participants were measured before and 3 months after Intacs ICRS implantation with a rotating Scheimpflug camera and scanning-slit topography. Outcome measures included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction and corneal topography. Results: The UDVA improved in 21 eyes (84%) and CDVA in 18 eyes (72%). The anterior average keratometry decreased from 51.80 D preoperatively to 49.59 D postoperatively (p<0.001) using the rotating Scheimpflug camera and Sim K decreased from 51.21 to 47.44 D using the scanning-slit topography. The posterior average keratometry decreased from -8.03 D preoperatively to -8.42 D postoperatively (p<0.001) using the rotating Scheimpflug camera. ACD decreased from 3.44 to 3.32mm (p<0.001) and from 3.28 to 3.19mm (p < 0.001) using the rotating Scheimpflug camera and scanning-slit topography, respectively. Conclusions: The implantation of Intacs segments induced corneal flattening of the anterior surface and corneal steepening of the posterior surface. Both anterior corneal flattening and posterior corneal steepening contributed to the decrease in the keratometric power.",

keywords = "Anterior chamber depth, Corneal topography, Intrastromal ring segment implantation, Keratoconus, Keratometry",

author = "Rho, {Chang Rae} and Na, {Kyung Sun} and Yoo, {Young Sik} and Chitra Pandey and Park, {Chang Won} and Joo, {Choun Ki}",

note = "Funding Information: This work was supported by the Industrial Strategic Technology Development Program (10040121, Development of high-speed OCT assisted femtosecond laser disruption system for ocular anterior segment surgery) funded by the Ministry of Knowledge Economy (MKE, Korea).",

year = "2013",

month = aug,

doi = "10.3109/02713683.2013.788723",

language = "English",

volume = "38",

pages = "843--850",

journal = "Current Eye Research",

issn = "0271-3683",

publisher = "Taylor and Francis Ltd.",

number = "8",

}

TY - JOUR

T1 - Changes in anterior and posterior corneal parameters in patients with keratoconus after intrastromal corneal-ring segment implantation

AU - Rho, Chang Rae

AU - Na, Kyung Sun

AU - Yoo, Young Sik

AU - Pandey, Chitra

AU - Park, Chang Won

AU - Joo, Choun Ki

N1 - Funding Information: This work was supported by the Industrial Strategic Technology Development Program (10040121, Development of high-speed OCT assisted femtosecond laser disruption system for ocular anterior segment surgery) funded by the Ministry of Knowledge Economy (MKE, Korea).

PY - 2013/8

Y1 - 2013/8

N2 - Purpose: To compare changes in the anterior and the posterior corneal parameters and the anterior chamber depth (ACD) measured by a rotating Scheimpflug camera and scanning-slit topography before and after intrastromal corneal ring segment (ICRS) implantation. Methods: Twenty-five eyes of 21 keratoconus patients who had Intacs (Addition Technology, Sunnyvale, CA) ICRS implantation were included. The anterior segment parameters of the participants were measured before and 3 months after Intacs ICRS implantation with a rotating Scheimpflug camera and scanning-slit topography. Outcome measures included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction and corneal topography. Results: The UDVA improved in 21 eyes (84%) and CDVA in 18 eyes (72%). The anterior average keratometry decreased from 51.80 D preoperatively to 49.59 D postoperatively (p<0.001) using the rotating Scheimpflug camera and Sim K decreased from 51.21 to 47.44 D using the scanning-slit topography. The posterior average keratometry decreased from -8.03 D preoperatively to -8.42 D postoperatively (p<0.001) using the rotating Scheimpflug camera. ACD decreased from 3.44 to 3.32mm (p<0.001) and from 3.28 to 3.19mm (p < 0.001) using the rotating Scheimpflug camera and scanning-slit topography, respectively. Conclusions: The implantation of Intacs segments induced corneal flattening of the anterior surface and corneal steepening of the posterior surface. Both anterior corneal flattening and posterior corneal steepening contributed to the decrease in the keratometric power.

AB - Purpose: To compare changes in the anterior and the posterior corneal parameters and the anterior chamber depth (ACD) measured by a rotating Scheimpflug camera and scanning-slit topography before and after intrastromal corneal ring segment (ICRS) implantation. Methods: Twenty-five eyes of 21 keratoconus patients who had Intacs (Addition Technology, Sunnyvale, CA) ICRS implantation were included. The anterior segment parameters of the participants were measured before and 3 months after Intacs ICRS implantation with a rotating Scheimpflug camera and scanning-slit topography. Outcome measures included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction and corneal topography. Results: The UDVA improved in 21 eyes (84%) and CDVA in 18 eyes (72%). The anterior average keratometry decreased from 51.80 D preoperatively to 49.59 D postoperatively (p<0.001) using the rotating Scheimpflug camera and Sim K decreased from 51.21 to 47.44 D using the scanning-slit topography. The posterior average keratometry decreased from -8.03 D preoperatively to -8.42 D postoperatively (p<0.001) using the rotating Scheimpflug camera. ACD decreased from 3.44 to 3.32mm (p<0.001) and from 3.28 to 3.19mm (p < 0.001) using the rotating Scheimpflug camera and scanning-slit topography, respectively. Conclusions: The implantation of Intacs segments induced corneal flattening of the anterior surface and corneal steepening of the posterior surface. Both anterior corneal flattening and posterior corneal steepening contributed to the decrease in the keratometric power.

KW - Anterior chamber depth

KW - Corneal topography

KW - Intrastromal ring segment implantation

KW - Keratoconus

KW - Keratometry

UR - http://www.scopus.com/inward/record.url?scp=84879595673&partnerID=8YFLogxK

U2 - 10.3109/02713683.2013.788723

DO - 10.3109/02713683.2013.788723

M3 - Article

C2 - 23806046

AN - SCOPUS:84879595673

SN - 0271-3683

VL - 38

SP - 843

EP - 850

JO - Current Eye Research

JF - Current Eye Research

IS - 8

ER -

Changes in anterior and posterior corneal parameters in patients with keratoconus after intrastromal corneal-ring segment implantation

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this