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Evaluation of the Repeatability and the Reproducibility of AL-Scan Measurements Obtained by Residents.

Kola M, Duran H, Turk A, Mollamehmetoglu S, Kalkisim A, Erdol H - J Ophthalmol (2014)

Bottom Line: Results.Conclusions.The AL-Scan device exhibits good repeatability and reproducibility in all biometric measurements and IOL power calculations, independent of the operator concerned.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Faculty of Medicine, Karadeniz Technical University, 61080 Trabzon, Turkey.

ABSTRACT
Purpose. To assess the repeatability and reproducibility of ocular biometry and intraocular lens (IOL) power measurements obtained by ophthalmology residents using an AL-Scan device, a novel optical biometer. Methods. Two ophthalmology residents were instructed regarding the AL-Scan device. Both performed ocular biometry and IOL power measurements using AL-Scan, three times on each of 128 eyes, independently of one another. Corneal keratometry readings, horizontal iris width, central corneal thickness, anterior chamber depth, pupil size, and axial length values measured by both residents were recorded together with IOL power values calculated on the basis of four different IOL calculation formulas (SRK/T, Holladay, and HofferQ). Repeatability and reproducibility of the measurements obtained were analyzed using the intraclass correlation coefficient (ICC). Results. Repeatability (ICC, 0.872-0.999 for resident 1 versus 0.905-0.999 for resident 2) and reproducibility (ICC, 0.916-0.999) were high for all biometric measurements. Repeatability (ICC, 0.981-0.983 for resident 1 versus 0.995-0.996 for resident 2) and reproducibility were also high for all IOL power measurements (ICC, 0.996 for all). Conclusions. The AL-Scan device exhibits good repeatability and reproducibility in all biometric measurements and IOL power calculations, independent of the operator concerned.

No MeSH data available.


Correlation of mean IOL power measurements performed by both residents using the SRK/T formula.
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fig1: Correlation of mean IOL power measurements performed by both residents using the SRK/T formula.

Mentions: Means of the three consecutive power IOL measurements performed by both residents are given in Table 4. Analysis of these values again revealed high reproducibility (ICC, 0.996 for all). Mean IOL power measurements performed by both residents exhibited a close correlation (r = 0.996, P < 0.0001 for the SRK/T formula (Figure 1); r = 0.996, P < 0.0001 for the Holladay formula; and r = 0.996, P < 0.0001 for the HofferQ formula), and variations in these measurements were again similar (P > 0.05 for all).


Evaluation of the Repeatability and the Reproducibility of AL-Scan Measurements Obtained by Residents.

Kola M, Duran H, Turk A, Mollamehmetoglu S, Kalkisim A, Erdol H - J Ophthalmol (2014)

Correlation of mean IOL power measurements performed by both residents using the SRK/T formula.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4129666&req=5

fig1: Correlation of mean IOL power measurements performed by both residents using the SRK/T formula.
Mentions: Means of the three consecutive power IOL measurements performed by both residents are given in Table 4. Analysis of these values again revealed high reproducibility (ICC, 0.996 for all). Mean IOL power measurements performed by both residents exhibited a close correlation (r = 0.996, P < 0.0001 for the SRK/T formula (Figure 1); r = 0.996, P < 0.0001 for the Holladay formula; and r = 0.996, P < 0.0001 for the HofferQ formula), and variations in these measurements were again similar (P > 0.05 for all).

Bottom Line: Results.Conclusions.The AL-Scan device exhibits good repeatability and reproducibility in all biometric measurements and IOL power calculations, independent of the operator concerned.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Faculty of Medicine, Karadeniz Technical University, 61080 Trabzon, Turkey.

ABSTRACT
Purpose. To assess the repeatability and reproducibility of ocular biometry and intraocular lens (IOL) power measurements obtained by ophthalmology residents using an AL-Scan device, a novel optical biometer. Methods. Two ophthalmology residents were instructed regarding the AL-Scan device. Both performed ocular biometry and IOL power measurements using AL-Scan, three times on each of 128 eyes, independently of one another. Corneal keratometry readings, horizontal iris width, central corneal thickness, anterior chamber depth, pupil size, and axial length values measured by both residents were recorded together with IOL power values calculated on the basis of four different IOL calculation formulas (SRK/T, Holladay, and HofferQ). Repeatability and reproducibility of the measurements obtained were analyzed using the intraclass correlation coefficient (ICC). Results. Repeatability (ICC, 0.872-0.999 for resident 1 versus 0.905-0.999 for resident 2) and reproducibility (ICC, 0.916-0.999) were high for all biometric measurements. Repeatability (ICC, 0.981-0.983 for resident 1 versus 0.995-0.996 for resident 2) and reproducibility were also high for all IOL power measurements (ICC, 0.996 for all). Conclusions. The AL-Scan device exhibits good repeatability and reproducibility in all biometric measurements and IOL power calculations, independent of the operator concerned.

No MeSH data available.