Toric implantable collamer lens for keratoconus.

Area of Science:

• Ophthalmology
• Corneal Surgery
• Refractive Surgery

Background:

• Keratoconus is a progressive corneal thinning causing myopia and irregular astigmatism, significantly impacting vision quality.
• Patients with keratoconus often experience visual disturbances like diplopia, halos, and ghost images.
• Standard treatments may be unsuitable for some keratoconus patients, necessitating alternative interventions.

Purpose of the Study:

• To evaluate the safety and efficacy of toric posterior chamber phakic intraocular lenses (PC pIOLs) for refractive error correction in keratoconus patients.
• To assess the outcomes of PC pIOL implantation, alone or combined with other procedures, in managing keratoconus-associated visual impairments.

Main Methods:

• The study involved implanting toric posterior chamber phakic intraocular lenses (PC pIOLs) in keratoconus patients unsuitable for other procedures.
• Procedures were performed off-label with specific patient informed consent.
• Data from several reports were aggregated to assess safety and efficacy.

Main Results:

• Reports indicate that toric PC pIOL implantation is a safe procedure for keratoconus patients.
• The efficacy of PC pIOLs in correcting refractive errors associated with keratoconus is supported by available data.
• Corneal higher-order aberrations remain a factor influencing the final visual quality post-procedure.

Conclusions:

• Toric PC pIOLs represent a viable surgical option for keratoconus patients with limited treatment alternatives.
• The procedure demonstrates safety and efficacy in addressing refractive errors.
• Further consideration of corneal higher-order aberrations is necessary for optimizing visual outcomes in these patients.