| Title |
Influence of overnight orthokeratology lens fitting decentration on corneal topography reshaping
|
|---|---|
| Published in |
Eye and Vision, March 2018
|
| DOI | 10.1186/s40662-018-0100-7 |
| Pubmed ID | |
| Authors |
Jiaojie Chen, Wei Huang, Rong Zhu, Jun Jiang, Yiyu Li |
| Abstract |
This retrospective study was designed to investigate the sole influence of orthokeratology (OK) lens fitting decentration on the Zernike coefficients of the reshaped anterior corneal surface. This study comprised a review of 106 right eyes and measurements of corneal topography both before OK and at 1-month follow-up visit. A routine was designed to calculate local corneal surface astigmatism and assist the determination of OK lens fitting decentration from pupil center. The pupil-centered corneal Zernike coefficients of baseline (PCCB) and post-treatment (PCCP) were calculated. Meanwhile, the OK-lens-centered corneal Zernike coefficients of post-treatment (OCCP) were also calculated and considered as the presumptive ideal fitting group without decentration. Relationships between lens fitting decentration and the change of Zernike coefficients including (PCCP - PCCB) and (PCCP - OCCP) were analyzed. Patients with a mean age of 11 ± 2.36 years old had an average spherical equivalent refractive error of -3.52 ± 1.06 D before OK. One month after treatment, OK lens fitting decentration from pupil center was 0.68 ± 0.35 mm. RMS of 3rd-order (P < 0.05), RMS of 4th-order (P < 0.001) and RMS of total high order (P < 0.001) corneal Zernike coefficients were increased in PCCP by comparing with OCCP, which was solely caused by lens fitting decentration. Nevertheless, no significant difference was observed in [Formula: see text] (P > 0.05). For the high order corneal Zernike coefficients in (PCCP - OCCP), radial distance of decentration was correlated with [Formula: see text] (r = -0.296, P < 0.05), [Formula: see text] (r = -0.396, P < 0.001), and [Formula: see text] (r = 0.449, P < 0.001), horizontal decentration was significantly correlated with [Formula: see text] (r = 0.901, P < 0.001) and [Formula: see text] (r = 0.340, P < 0.001), and vertical decentration was significantly correlated with [Formula: see text] (r = 0.904, P < 0.001). OK lens fitting decentration within 1.5 mm hardly influenced the change of corneal spherical power for myopia correction, but significantly induced additional corneal high order Zernike coefficients including [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text]. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 24 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 24 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 4 | 17% |
| Professor > Associate Professor | 3 | 13% |
| Student > Postgraduate | 2 | 8% |
| Student > Bachelor | 2 | 8% |
| Lecturer > Senior Lecturer | 1 | 4% |
| Other | 3 | 13% |
| Unknown | 9 | 38% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 7 | 29% |
| Nursing and Health Professions | 4 | 17% |
| Psychology | 2 | 8% |
| Unspecified | 1 | 4% |
| Unknown | 10 | 42% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 26 June 2018.
All research outputs
#20,469,520
of 23,028,364 outputs
Outputs from Eye and Vision
#120
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Outputs of similar age
#294,860
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Outputs of similar age from Eye and Vision
#2
of 7 outputs
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