Clinical Scorecard: Comparison of Stability Between Panoptix and AT Lisa Trifocal Intraocular Lenses with Distinct Haptic Designs Utilizing the iTrace System

At a Glance

Key Highlights

• Trifocal toric IOLs correct distance, intermediate, and near vision simultaneously, addressing presbyopia and astigmatism.
• Rotational instability of toric IOLs can cause residual astigmatism and visual disturbances such as halos and reduced contrast sensitivity.
• The iTrace system provides objective, efficient postoperative assessment of toric IOL rotational alignment.

Guideline-Based Recommendations

Diagnosis

• Perform comprehensive preoperative ophthalmological examination including visual acuity, intraocular pressure, slit lamp, and fundus exam.
• Assess corneal topography and biometry to quantify astigmatism and ocular biometrics.
• Use iTrace or equivalent objective measurement tools for postoperative toric IOL alignment evaluation.

Management

• Select trifocal toric IOL type based on patient biometric parameters and surgeon-patient discussion of lens characteristics.
• Consider haptic design and material properties when choosing IOL to optimize rotational stability.
• Aim for spectacle independence by minimizing residual astigmatism through precise IOL alignment.

Monitoring & Follow-up

• Conduct postoperative assessments using iTrace system to monitor IOL rotational stability.
• Evaluate for visual disturbances such as halos or reduced contrast sensitivity that may indicate IOL rotation.
• Regular follow-up to detect and manage any IOL misalignment or residual refractive error.

Risks

• Rotational instability leading to residual astigmatism and decreased visual quality.
• Potential visual disturbances including halos and reduced contrast sensitivity with IOL misalignment.
• Limitations in detecting subtle rotational differences due to variability in measurement and sample size.

Patient & Prescribing Data

Patients over 50 years with regular corneal astigmatism >0.80 D desiring spectacle independence

Both PanOptix (C-loop, hydrophobic acrylic) and AT Lisa (plate haptic, hydrophilic acrylic) trifocal toric IOLs are commonly used; selection should consider rotational stability influenced by haptic design and material.

Clinical Best Practices

• Use objective measurement systems like iTrace for accurate postoperative assessment of toric IOL rotation.
• Discuss with patients the advantages and disadvantages of different trifocal toric IOL designs prior to surgery.
• Exclude patients with irregular astigmatism, ocular comorbidities, or prior ocular surgeries to optimize outcomes.
• Perform power analysis to ensure adequate sample size for detecting clinically meaningful differences in IOL rotation in studies.

References

• 1. Prevalence of corneal astigmatism in cataract candidates
• 2. Toric IOL failure rate per degree of deviation
• 3. Impact of rotational instability on trifocal toric IOL visual quality
• 4-6. Objective methods for toric IOL rotation assessment
• 7. Haptic design influence on IOL centration and rotation
• 8-9. IOL material adhesion properties
• 10-11. iTrace system advantages in postoperative IOL assessment