POSITION OF IN-THE-BAG POSTERIOR CHAMBER INTRAOCULAR LENSES RELATIVE TO THE LIMBUS: Applications to Scleral-Sutured Lenses. Issue 7 (July 2021)
- Record Type:
- Journal Article
- Title:
- POSITION OF IN-THE-BAG POSTERIOR CHAMBER INTRAOCULAR LENSES RELATIVE TO THE LIMBUS: Applications to Scleral-Sutured Lenses. Issue 7 (July 2021)
- Main Title:
- POSITION OF IN-THE-BAG POSTERIOR CHAMBER INTRAOCULAR LENSES RELATIVE TO THE LIMBUS
- Authors:
- Vingopoulos, Filippos
Nair, Archana
See, Craig W.
Iyengar, Nishanth
Haberman, Ilyse
Sperber, Laurence
Lazzaro, Douglas R.
Singh, Rishi
Ho, Allen
Gupta, Omesh
Sharma, Sumit
Modi, Yasha - Abstract:
- Abstract : Purpose: To characterize the true position of in-the-bag intraocular lenses (IOLs) relative to the limbus using ultrasound biomicroscopy and estimate scleral-sutured IOL positioning. Methods: This prospective single-center study included 70 eyes of 41 patients with in-the-bag posterior chamber IOLs. Four vertical ultrasound biomicroscopy captures were performed in each eye in the superior, inferior, nasal, and temporal quadrants. Postoperative biometric data were collected. The primary outcome was the vertical distance of the in-the-bag IOL from the sclerocorneal limbus. Secondary outcomes included anterior shift and refractive change of a theoretical scleral-sutured IOL using sclerotomies at 2.5 mm and 3 mm posterior to the limbus. Results: A total of 265 ultrasound biomicroscopy images were analyzed, including 64 superior, 69 inferior, 66 nasal, and 66 temporal. The true in-the-bag IOL position measured as distance posterior to the sclerocorneal limbus was 4.23 ± 0.56 mm superiorly, 4.22 ± 0.46 mm inferiorly, 3.95 ± 0.48 mm nasally, and 3.86 ± 0.52 mm temporally. The anterior shift of a theoretical scleral-sutured IOL was 0.60 mm for a 3-mm sclerotomy and 0.93 mm for a 2.5-mm sclerotomy, resulting in a theoretical myopic shift of 0.45 diopter (D) and 0.79 D, respectively, assuming a 15-D IOL. Larger biometric measurements correlated with a more posterior in-the-bag position. Conclusion: True in-the-bag IOL position was found to be more posterior than estimatesAbstract : Purpose: To characterize the true position of in-the-bag intraocular lenses (IOLs) relative to the limbus using ultrasound biomicroscopy and estimate scleral-sutured IOL positioning. Methods: This prospective single-center study included 70 eyes of 41 patients with in-the-bag posterior chamber IOLs. Four vertical ultrasound biomicroscopy captures were performed in each eye in the superior, inferior, nasal, and temporal quadrants. Postoperative biometric data were collected. The primary outcome was the vertical distance of the in-the-bag IOL from the sclerocorneal limbus. Secondary outcomes included anterior shift and refractive change of a theoretical scleral-sutured IOL using sclerotomies at 2.5 mm and 3 mm posterior to the limbus. Results: A total of 265 ultrasound biomicroscopy images were analyzed, including 64 superior, 69 inferior, 66 nasal, and 66 temporal. The true in-the-bag IOL position measured as distance posterior to the sclerocorneal limbus was 4.23 ± 0.56 mm superiorly, 4.22 ± 0.46 mm inferiorly, 3.95 ± 0.48 mm nasally, and 3.86 ± 0.52 mm temporally. The anterior shift of a theoretical scleral-sutured IOL was 0.60 mm for a 3-mm sclerotomy and 0.93 mm for a 2.5-mm sclerotomy, resulting in a theoretical myopic shift of 0.45 diopter (D) and 0.79 D, respectively, assuming a 15-D IOL. Larger biometric measurements correlated with a more posterior in-the-bag position. Conclusion: True in-the-bag IOL position was found to be more posterior than estimates of scleral-sutured IOLs. Additional corrections in scleral-sutured IOL calculations may improve refractive outcomes. Abstract : True in-the-bag intraocular lens position, measured with ultrasound biomicroscopy, was consistently more posterior to the limbus (3.5–4 mm) than the position of sclerotomies currently used (3 mm). To offset the ensuing myopic surprises often reported in scleral-sutured intraocular lenses, we recommend adjustments in secondary intraocular lens formulas. … (more)
- Is Part Of:
- Retina. Volume 41:Issue 7(2021)
- Journal:
- Retina
- Issue:
- Volume 41:Issue 7(2021)
- Issue Display:
- Volume 41, Issue 7 (2021)
- Year:
- 2021
- Volume:
- 41
- Issue:
- 7
- Issue Sort Value:
- 2021-0041-0007-0000
- Page Start:
- Page End:
- Publication Date:
- 2021-07
- Subjects:
- cataract formulas -- intraocular lens position -- in-the-bag IOL position -- refractive shift -- secondary IOLs -- scleral-sutured IOLs -- ultrasound biomicroscopy
Retina -- Diseases -- Periodicals
Retinal Diseases
Vitreous Body
617.735 - Journal URLs:
- http://journals.lww.com/retinajournal/pages/default.aspx ↗
http://journals.lww.com ↗ - DOI:
- 10.1097/IAE.0000000000003044 ↗
- Languages:
- English
- ISSNs:
- 0275-004X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 7785.510300
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 25579.xml