The pseudophakic eye
Olsen and colleagues describe a method for back-solving the power of an intraocular lens (IOL) in situ based on laser biometry and ray-tracing analysis of the pseudophakic eye.
This study comprised 767 pseudophakic eyes with an IOL power ranging from -2.00 to +36.00 D. Preoperatively, the corneal radius was measured with conventional autokeratometry and the axial length (AL) with optical biometry. After surgery, the position of the IOL was recorded using laser interferometry. Based on the postoperative refraction and the biometric measurements, a ray-tracing analysis was performed back-solving for the power of the IOL in situ. The analysis was performed assuming pupil diameters from 0.0 to 8.0mm with and without correction for the Stiles-Crawford effect.
The prediction error showed no bias with IOL power or with AL. The calculated IOL power depended on the assumed pupil size and the Stiles-Crawford effect. However, the latter had a modulatory effect on the prediction error for large pupil diameters (>5.0mm) only. The researchers conclude that the optics of the pseudophakic eye can be accurately described using exact ray tracing and modern biometric techniques.
T Olsen et al., JCRS, “Ray-tracing analysis of intraocular lens power in situ,†641-647
Latest Articles
Nutrition and the Eye: A Recipe for Success
A look at the evidence for tasty ways of lowering risks and improving ocular health.
New Award to Encourage Research into Sustainable Practices
Sharing a Vision for the Future
ESCRS leaders update Trieste conference on ESCRS initiatives.
Extending Depth of Satisfaction
The ESCRS Eye Journal Club discuss a new study reviewing the causes and management of dissatisfaction after implantation of an EDOF IOL.
Conventional Versus Laser-Assisted Cataract Surgery
Evidence favours conventional technique in most cases.
AI Scribing and Telephone Management
Automating note-taking and call centres could boost practice efficiency.
AI Analysis and the Cornea
A combination of better imaging and AI deep learning could significantly improve corneal imaging and diagnosis.
Cooking a Feast for the Eyes
A cookbook to promote ocular health through thoughtful and traditional cuisine.
Need to Know: Spherical Aberration
Part three of this series examines spherical aberration and its influence on higher-order aberrations.
Generating AI’s Potential
How generative AI impacts medicine, society, and the environment.