Posterior chamber myopia lenses in phakic eyes

Area of Science:

• Ophthalmology
• Surgical Techniques
• Intraocular Lenses

Background:

• High myopia presents significant challenges for vision correction.
• Phakic eyes require specialized intraocular lens (IOL) implantation techniques.
• Neutralizing high myopia with posterior chamber IOLs necessitates precise surgical methods.

Purpose of the Study:

• To determine the optimal technique for implanting a hypernegative intraocular lens (IOL) in the posterior chamber of phakic eyes.
• To evaluate the outcomes of IOL implantation for neutralizing high myopia.
• To identify potential complications and best practices for IOL placement.

Main Methods:

• Prospective study involving 69 eyes of 37 patients implanted with the Chiron-Adatomed silicone myopia IOL.
• Surgical technique focused on IOL placement within the ciliary sulcus, matching corneal diameter.
• Preoperative intravenous prednisone administered to prevent iritis; spatula pressure on the crystalline lens avoided.

Main Results:

• Postoperative refraction was highly accurate, with a mean difference of +0.07 +/- 1.05 diopters (D) at 3 months.
• No significant decentration observed when IOL length matched corneal diameter and placement was in the ciliary sulcus.
• Eight of 45 eyes with clear cortices developed central subcapsular opacities within 1-2 years, likely IOL-induced.

Conclusions:

• The described technique for implanting the Chiron-Adatomed IOL can achieve accurate refractive outcomes.
• The potential for IOL-induced posterior capsule opacities necessitates caution.
• Current use of this IOL should be restricted to older patients with early cataracts pending further investigation.