Ekesten, Björn
- Department of Large Animal Clinical Sciences, Swedish University of Agricultural Sciences
Abstract
Purpose: To obtain a model suitable for evaluation of the anterior chamber depth (ACD) maintaining capacity of viscoelastic substances - a critical parameter in cataract surgery.Methods: ACD was estimated using an anterior segment analysis system (EAS-1000, Nidek Co Ltd, Japan). Variation was studied as an effect of batch number and eye within batch, storage, globe fixation, globe position, and repeated analyses of Scheimpflug images.Results: Considerable variation in ACD was found between eyes, batches, and as a result of prolonged storage (biological factors). Different IOPs before surgery caused significant alterations in ACD after overfilling with a viscoelastic substance. No significant differences were found when the globe position was altered or when the ACD was re-estimated repeatedly from the same photograph.Conclusion: Differences due to biological factors are more important than methodological errors caused by the Scheimpflug instrument. To reduce these variations when viscoelastics are evaluated, all measurements should be calculated as % of ACD before surgery and the anterior chamber should be overfilled with a viscoelastic solution.
Keywords
anterior chamber depth; ACD; viscoelastic solution; Healon; EAS-1000 Scheimpflug; porcine eyes
Published in
Acta Ophthalmologica Scandinavica
2001, volume: 79, number: 6, pages: 576-579
Publisher: BLACKWELL MUNKSGAARD
SLU Authors
UKÄ Subject classification
Ophthalmology
Publication identifier
- DOI: https://doi.org/10.1034/j.1600-0420.2001.790606.x
Permanent link to this page (URI)
https://res.slu.se/id/publ/107284