The newest generation Lucia 621 has a step vault design that is claimed to provide excellent positional and refractive predictability.

In order to explore the positional stability, anterior chamber depth stability is examined as marker for haptic buckling comparing positional behaviour after conventional and femtosecond-laser assisted cataract surgery.

In order to explore the positional stability, anterior chamber depth stability is examined as marker for haptic buckling comparing positional behaviour after conventional and femtosecond-laser assisted cataract surgery.

Furthermore, the refractive outcome of CT Lucia 621P/PY is examined, providing optimized (en bloc optimization) formula constants for both, conventional and femtosecond-laser assisted cataract surgery for Haigis, Hoffer Q, Holladay I, SRK/T and Castrop formulae.

Besides ACD, further parameters for IOL stability are examined (IOL tilt/decentration) and consequences for the aberration profile are described.

Inclusion Criteria:

• Adult subject with a minimum age of 22 years
• Planned natural lens replacement with posterior chamber IOL implantation
• Clear intraocular media other than cataract
• Availability, willingness, ability and sufficient cognitive awareness to comply with examination procedures and study visit
• Ability to consent to the participation in study
• Signed informed consent

Exclusion Criteria:

• Corneal pathology/ectasia
• Prior ophthalmic surgery
• Zonular-defects, unstable bag
• Macular pathologies
• Expected Visual acuity of less than 0.63 (decimal)
• Glaucoma
• Use of systemic or ocular medication that might affect vision
• Patient is pregnant, plans to become pregnant, is lactating
• Concurrent participation in any other clinical trial with an investigation product

Up to 50 subjects requiring IOL implantation to treat aphakia after extracapsular cataract extraction or phacoemulsification.