Pseudophakic Anterior Chamber Depth Measurement in Second Eye Refinement Cataract Surgery

Pseudophakic Anterior Chamber Depth Measurement in Second Eye Refinement Cataract Surgery

To study the effective lens position concept in second eye refinement (SER) cataract surgery, by relating inter-ocular symmetry of pseudophakic anterior chamber depth (pACD) measured in Pentacam and SER refractive outcomes.

A retrospective chart review was conducted, including demographics (age and gender) and several parameters for both the first and second eyes, including the intra-ocular lens power calculation using the HofferQ, SRK/T and Holladay 1 formulas. Pentacam HR was used for pseudophakic anterior chamber depth measurement, and manual measurement was performed by a single investigator tracing a line between the anterior surface of the intra-ocular lens and the central corneal epithelium apex. Second eye refinement in the intra-ocular lens power selection for the second eye was performed using a theoretical 50% partial adjustment of the prediction error of the first eye. To relate refractive outcomes to pACD values, the investigators performed subgroup analysis based in consecutive 50µm increments in inter-ocular asymmetry of pACD (50-600).

Inclusion Criteria:

• patients admitted for bilateral age-related cataract surgery

Exclusion Criteria:

• Age < 18 years old
• Previous or combined ocular surgery
• Manual extracapsular cataract extraction and not phacoemulsification
• Corneal sutures
• Implantation of any other IOL type
• IOL implanted in the sulcus
• Intra or postoperative complication
• Post-operative best-corrected visual acuity worse than 5/10
• Anterior corneal astigmatism>3.00 D
• Inadequate cooperation for Pentacam HR examination