{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T19:35:17Z","timestamp":1786649717344,"version":"build-2736575974"},"reference-count":19,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,6]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>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.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>\n                      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\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      value &lt;0.05 was taken as significant.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      The study included 40 males and 10 females, with an age range of 6\u201383 years (mean 41.9 years). The mean AL of the oil-filled eye as measured by manual A-scan was 31.76 mm \u00b1 3.09 and by IOL master was 24.7 mm \u00b1 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 \u00d7 manual AL. The mean difference between PAL and optically measured AL with silicone oil\n                      <jats:italic toggle=\"yes\">in situ<\/jats:italic>\n                      was 0.98 \u00b1 1.67.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>We propose a new formula for better prediction of the correct AL in silicone oil-filled eyes using ultrasound-based AL measurement.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/ijo.ijo_2187_22","type":"journal-article","created":{"date-parts":[[2023,6,14]],"date-time":"2023-06-14T09:06:52Z","timestamp":1686733612000},"page":"2466-2468","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":3,"title":["Simplifying biometry in oil-filled eyes: A novel formula for axial length calculation in eyes with 1000 cSt silicone oil"],"prefix":"10.4103","volume":"71","author":[{"given":"Monika","family":"Kapoor","sequence":"first","affiliation":[{"name":"Nethradhama Super Speciality Eye Hospital, Bengaluru, Karnataka, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pradeep","family":"Venkatesh","sequence":"additional","affiliation":[{"name":"Rajendra Prasad Center for Ophthalmic Sciences, AIIMS, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rohan","family":"Chawla","sequence":"additional","affiliation":[{"name":"Rajendra Prasad Center for Ophthalmic Sciences, AIIMS, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shreyas","family":"Temkar","sequence":"additional","affiliation":[{"name":"Rajendra Prasad Center for Ophthalmic Sciences, AIIMS, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esha","family":"Aggarwal","sequence":"additional","affiliation":[{"name":"Rajendra Prasad Center for Ophthalmic Sciences, AIIMS, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2023,6,14]]},"reference":[{"issue":"Suppl 1","key":"R1-20251006","first-page":"36","article-title":"Is there a role for long-term silicone oil tamponade for more than twelve months in vitreoretinal surgery?Ophthalmol J Int Ophtalmol Int J Ophthalmol Z Augenheilkd","volume":"226","author":"Stappler","year":"2011"},{"key":"R2-20251006","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1016\/S0886-3350(00)00585-X","article-title":"Posterior subcapsular and nuclear cataract after vitrectomy","volume":"27","author":"Hsuan","year":"2001","journal-title":"J Cataract Refract Surg"},{"key":"R3-20251006","doi-asserted-by":"crossref","first-page":"881","DOI":"10.1016\/S0002-9394(01)01263-6","article-title":"Duration of vitrectomy and postoperative cataract in the vitrectomy for macular hole study","volume":"132","author":"Cheng","year":"2001","journal-title":"Am J Ophthalmol"},{"key":"R4-20251006","doi-asserted-by":"crossref","first-page":"1466","DOI":"10.1016\/S0161-6420(95)30844-5","article-title":"Nuclear sclerotic cataract after vitrectomy in patients younger than 50 years of age","volume":"102","author":"Melberg","year":"1995","journal-title":"Ophthalmology"},{"key":"R5-20251006","first-page":"319","article-title":"Biometry of the silicone oil-filled eye","volume":"13","author":"Murray","year":"1999","journal-title":"Eye Lond Engl"},{"key":"R6-20251006","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1034\/j.1600-0420.2000.078001089.x","article-title":"The acoustic lighthouse effect. 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topical anesthesia","volume":"29","author":"Boscia","year":"2003","journal-title":"J Cataract Refract Surg"},{"key":"R10-20251006","doi-asserted-by":"crossref","first-page":"1243","DOI":"10.1016\/S0886-3350(00)00864-6","article-title":"Phacoemulsification combined with silicone oil removal through a posterior capsulorhexis","volume":"27","author":"Dada","year":"2001","journal-title":"J Cataract Refract Surg"},{"key":"R11-20251006","doi-asserted-by":"crossref","first-page":"622","DOI":"10.1177\/112067210301300705","article-title":"Intraoperative biometry for intraocular lens (IOL) power calculation at silicone oil removal","volume":"13","author":"el-Baha","year":"2003","journal-title":"Eur J Ophthalmol"},{"key":"R12-20251006","doi-asserted-by":"crossref","first-page":"1190","DOI":"10.1016\/j.jcrs.2009.04.015","article-title":"Intraoperative retinoscopy for intraocular lens power estimation in cases of combined phacoemulsification and silicone oil 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