Simplifying biometry in oil-filled eyes: A novel formula for axial length calculation in eyes with 1000 cSt silicone oil

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dc.contributor.authorKapoor, Monikaen_US
dc.contributor.authorVenkatesh, Pradeepen_US
dc.contributor.authorChawla, Rohanen_US
dc.contributor.authorTemkar, Shreyasen_US
dc.contributor.authorAggarwal, Eshaen_US
dc.date.accessioned2023-08-25T06:37:24Z
dc.date.available2023-08-25T06:37:24Z
dc.date.issued2023-06
dc.description.abstractPurpose: To derive a formula for accurate axial length (AL) assessment using routine ultrasound in silicone oil?filled eyes, where optical biometry is unavailable or not possible. Methods: This was a prospective, consecutive, nonrandomized study of 50 eyes of 50 patients conducted in a tertiary care hospital in North India. AL measurements were taken using both manual A?scan and IOL master, both in silicone oil?filled status and 3 weeks after silicone oil removal. A correction factor of 0.7 was used for AL adjustment in oil?filled eyes. The corrected AL (cAL) was compared with IOL master values in oil?filled eyes. Agreement analysis was carried out using Bland Altman plot. Linear regression analysis was done using uncorrected manual AL to find a new equation. Data was analyzed using Stata 14. A P value <0.05 was taken as significant. Results: The study included 40 males and 10 females, with an age range of 6–83 years (mean 41.9 years). The mean AL of the oil?filled eye as measured by manual A?scan was 31.76 mm ± 3.09 and by IOL master was 24.7 mm ± 1.74. Linear regression analysis was performed in randomly selected 35 eyes of the observed data to obtain a new equation: predicted AL (PAL) = 14 + 0.3 × manual AL. The mean difference between PAL and optically measured AL with silicone oil in situ was 0.98 ± 1.67. Conclusion: We propose a new formula for better prediction of the correct AL in silicone oil?filled eyes using ultrasound?based AL measurement.en_US
dc.identifier.affiliationsNethradhama Super Speciality Eye Hospital, Bengaluru, Karnataka, Indiaen_US
dc.identifier.affiliationsRajendra Prasad Center for Ophthalmic Sciences, AIIMS, New Delhi, Indiaen_US
dc.identifier.citationKapoor Monika, Venkatesh Pradeep, Chawla Rohan, Temkar Shreyas, Aggarwal Esha. Simplifying biometry in oil-filled eyes: A novel formula for axial length calculation in eyes with 1000 cSt silicone oil. Indian Journal of Ophthalmology. 2023 Jun; 71(6): 2466-2468en_US
dc.identifier.issn1998-3689
dc.identifier.issn0301-4738
dc.identifier.placeIndiaen_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/225081
dc.languageenen_US
dc.publisherAll India Ophthalmological Societyen_US
dc.relation.issuenumber6en_US
dc.relation.volume71en_US
dc.source.urihttps://doi.org/10.4103/ijo.IJO_2187_22en_US
dc.subjectAxial length in oil?filled eyeen_US
dc.subjectaxial length in silicone oilen_US
dc.subjectbiometry in oil?filled eyesen_US
dc.subjectbiometry in silicone oilen_US
dc.subjectcataract in oil?filled eyesen_US
dc.subjectpostvitrectomy cataracten_US
dc.titleSimplifying biometry in oil-filled eyes: A novel formula for axial length calculation in eyes with 1000 cSt silicone oilen_US
dc.typeJournal Articleen_US
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