Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration

Fabrizio Zeri; Assunta Di Vizio; Maurizio Guida; Anastasia Rotondi; Silvia Tavazzi; Shehzad A. Naroo

doi:10.1016/j.clae.2020.02.008

Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration

Fabrizio Zeri^*
, Assunta Di Vizio
, Maurizio Guida
, Anastasia Rotondi
, Silvia Tavazzi
, Shehzad A. Naroo

^*Corresponding author for this work

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

4 Citations (Scopus)

32 Downloads (Pure)

Abstract

PURPOSE: To evaluate the accuracy and reliability (inter and intra-observer) of a method to assess multifocal contact lenses (MCLs) centration using a corneal topography unit.

METHOD: Daily-disposable MCLs (Fusion 1 day Presbyo) were fitted on both eyes of the subjects. For each lens fit a slit lamp digital picture and videokeratograph image were taken in a rapid but randomised sequence. Photo-editing software was used to assess the position of the MCL centre with respect to pupil centre as taken from the slit lamp photograph. The position of the MCL centre was automatically detected as the point of maximum curvature from the videokeratography. Three further manual and qualitative procedures to detect MCL centre, comparing a template of CLs optic zones to the videokeratographic image were performed by 4 practitioners using 3 different algorithms to represent the topographic map. Each manual reading was repeated 3 times.

RESULTS: Twenty-two subjects (11 males) aged 22.8 ± 1.9 years (range 20.8-27.0 years) were recruited. The accuracy of the 4 topographic assessments in determining the centre coordinates of the MCL with respect to SL assessment was good: no differences were found in the left eyes and although in the right eyes a more temporal and superior position of MCLs was determined (paired t-test, p < 0.05) the difference was clinically negligible (0.16 ± 0.36 mm horizontally, 0.23 ± 0.48 vertically). Amongst the 4 practitioners one-way Anova for repeated measures showed no differences for any of the 3 manual assessments. Intra-class correlation coefficient was calculated among the 3 readings for each manual procedure and was very good (between 0.75 and 0.98) in 3 practitioners and moderate (between 0.49 and 0.92) in the fourth.

CONCLUSIONS: The assessment of MCL centration by performing corneal topography over the MCL is an accurate method. Furthermore, inter and intra-practitioner reliability showed by manual procedures appeared very good.

Original language	English
Pages (from-to)	448-457
Number of pages	10
Journal	Contact Lens and Anterior Eye
Volume	43
Issue number	5
Early online date	19 Feb 2020
DOIs	https://doi.org/10.1016/j.clae.2020.02.008
Publication status	Published - Oct 2020

Bibliographical note

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. During the period of the research, Dr Fabrizio Zeri was funded with the support of the European Union under a Marie Curie Intra-European Fellowship for Career Development (FP7), Grant Agreement number 622786 .

Keywords

Contact lens centration
Multifocal contact lenses
Presbyopia
Topography

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10.1016/j.clae.2020.02.008

Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration
© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 1.29 MBLicence: CC BY-NC-ND 3.0

Cite this

@article{e0782dc4f4fc40bb93a4bb0cb5834326,

title = "Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration",

abstract = "PURPOSE: To evaluate the accuracy and reliability (inter and intra-observer) of a method to assess multifocal contact lenses (MCLs) centration using a corneal topography unit.METHOD: Daily-disposable MCLs (Fusion 1 day Presbyo) were fitted on both eyes of the subjects. For each lens fit a slit lamp digital picture and videokeratograph image were taken in a rapid but randomised sequence. Photo-editing software was used to assess the position of the MCL centre with respect to pupil centre as taken from the slit lamp photograph. The position of the MCL centre was automatically detected as the point of maximum curvature from the videokeratography. Three further manual and qualitative procedures to detect MCL centre, comparing a template of CLs optic zones to the videokeratographic image were performed by 4 practitioners using 3 different algorithms to represent the topographic map. Each manual reading was repeated 3 times.RESULTS: Twenty-two subjects (11 males) aged 22.8 ± 1.9 years (range 20.8-27.0 years) were recruited. The accuracy of the 4 topographic assessments in determining the centre coordinates of the MCL with respect to SL assessment was good: no differences were found in the left eyes and although in the right eyes a more temporal and superior position of MCLs was determined (paired t-test, p < 0.05) the difference was clinically negligible (0.16 ± 0.36 mm horizontally, 0.23 ± 0.48 vertically). Amongst the 4 practitioners one-way Anova for repeated measures showed no differences for any of the 3 manual assessments. Intra-class correlation coefficient was calculated among the 3 readings for each manual procedure and was very good (between 0.75 and 0.98) in 3 practitioners and moderate (between 0.49 and 0.92) in the fourth.CONCLUSIONS: The assessment of MCL centration by performing corneal topography over the MCL is an accurate method. Furthermore, inter and intra-practitioner reliability showed by manual procedures appeared very good.",

keywords = "Contact lens centration, Multifocal contact lenses, Presbyopia, Topography",

author = "Fabrizio Zeri and \{Di Vizio\}, Assunta and Maurizio Guida and Anastasia Rotondi and Silvia Tavazzi and Naroo, \{Shehzad A.\}",

note = "{\textcopyright} 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ",

year = "2020",

month = oct,

doi = "10.1016/j.clae.2020.02.008",

language = "English",

volume = "43",

pages = "448--457",

journal = "Contact Lens and Anterior Eye",

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T1 - Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration

AU - Zeri, Fabrizio

AU - Di Vizio, Assunta

AU - Guida, Maurizio

AU - Rotondi, Anastasia

AU - Tavazzi, Silvia

AU - Naroo, Shehzad A.

PY - 2020/10

Y1 - 2020/10

N2 - PURPOSE: To evaluate the accuracy and reliability (inter and intra-observer) of a method to assess multifocal contact lenses (MCLs) centration using a corneal topography unit.METHOD: Daily-disposable MCLs (Fusion 1 day Presbyo) were fitted on both eyes of the subjects. For each lens fit a slit lamp digital picture and videokeratograph image were taken in a rapid but randomised sequence. Photo-editing software was used to assess the position of the MCL centre with respect to pupil centre as taken from the slit lamp photograph. The position of the MCL centre was automatically detected as the point of maximum curvature from the videokeratography. Three further manual and qualitative procedures to detect MCL centre, comparing a template of CLs optic zones to the videokeratographic image were performed by 4 practitioners using 3 different algorithms to represent the topographic map. Each manual reading was repeated 3 times.RESULTS: Twenty-two subjects (11 males) aged 22.8 ± 1.9 years (range 20.8-27.0 years) were recruited. The accuracy of the 4 topographic assessments in determining the centre coordinates of the MCL with respect to SL assessment was good: no differences were found in the left eyes and although in the right eyes a more temporal and superior position of MCLs was determined (paired t-test, p < 0.05) the difference was clinically negligible (0.16 ± 0.36 mm horizontally, 0.23 ± 0.48 vertically). Amongst the 4 practitioners one-way Anova for repeated measures showed no differences for any of the 3 manual assessments. Intra-class correlation coefficient was calculated among the 3 readings for each manual procedure and was very good (between 0.75 and 0.98) in 3 practitioners and moderate (between 0.49 and 0.92) in the fourth.CONCLUSIONS: The assessment of MCL centration by performing corneal topography over the MCL is an accurate method. Furthermore, inter and intra-practitioner reliability showed by manual procedures appeared very good.

AB - PURPOSE: To evaluate the accuracy and reliability (inter and intra-observer) of a method to assess multifocal contact lenses (MCLs) centration using a corneal topography unit.METHOD: Daily-disposable MCLs (Fusion 1 day Presbyo) were fitted on both eyes of the subjects. For each lens fit a slit lamp digital picture and videokeratograph image were taken in a rapid but randomised sequence. Photo-editing software was used to assess the position of the MCL centre with respect to pupil centre as taken from the slit lamp photograph. The position of the MCL centre was automatically detected as the point of maximum curvature from the videokeratography. Three further manual and qualitative procedures to detect MCL centre, comparing a template of CLs optic zones to the videokeratographic image were performed by 4 practitioners using 3 different algorithms to represent the topographic map. Each manual reading was repeated 3 times.RESULTS: Twenty-two subjects (11 males) aged 22.8 ± 1.9 years (range 20.8-27.0 years) were recruited. The accuracy of the 4 topographic assessments in determining the centre coordinates of the MCL with respect to SL assessment was good: no differences were found in the left eyes and although in the right eyes a more temporal and superior position of MCLs was determined (paired t-test, p < 0.05) the difference was clinically negligible (0.16 ± 0.36 mm horizontally, 0.23 ± 0.48 vertically). Amongst the 4 practitioners one-way Anova for repeated measures showed no differences for any of the 3 manual assessments. Intra-class correlation coefficient was calculated among the 3 readings for each manual procedure and was very good (between 0.75 and 0.98) in 3 practitioners and moderate (between 0.49 and 0.92) in the fourth.CONCLUSIONS: The assessment of MCL centration by performing corneal topography over the MCL is an accurate method. Furthermore, inter and intra-practitioner reliability showed by manual procedures appeared very good.

KW - Contact lens centration

KW - Multifocal contact lenses

KW - Presbyopia

KW - Topography

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UR - https://www.sciencedirect.com/science/article/pii/S1367048420300266?via%3Dihub

U2 - 10.1016/j.clae.2020.02.008

DO - 10.1016/j.clae.2020.02.008

M3 - Article

C2 - 32088134

AN - SCOPUS:85079783977

SN - 1367-0484

VL - 43

SP - 448

EP - 457

JO - Contact Lens and Anterior Eye

JF - Contact Lens and Anterior Eye

IS - 5

ER -

Accuracy, inter-observer and intra-observer reliability in topography assessment of multifocal contact lens centration

Abstract

Bibliographical note

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