Light adjustable lenses offer stability of refraction

July 22, 2009

Residual myopic errors can be successfully corrected postoperatively by using light-adjustable lens technology (LAL) in cataract patients, concludes a study published online by Ophthalmology.

Residual myopic errors can be successfully corrected postoperatively by using light-adjustable lens technology (LAL) in cataract patients, concludes a study published online by Ophthalmology.

Arturo Chayet from the Codet Vision Institute, Mexico and colleagues from the US conducted a prospective study implanting LALs that would purposely result in myopic errors of up to -1.5 D in 14 eyes of 14 patients. The LALs were treated with a spatial intensity profile to induce a targeted myopic refractive change. The LALs were treated again once the desired correction was achieved in order to 'lock in' the lens power.

Thirteen of the 14 eyes attained 0.25 D of the target refraction one day following the 'lock-in' and 100% of eyes achieved target refraction adjustment within 0.5 D during the 9-month follow-up period. No changes were recorded in manifest spherical refraction between the first day post 'lock-in' and the end of follow-up.

The researchers noted that the mean rate of refractive change was 0.006 D per month, making this treatment approach approximately six times more stable than laser corneal refractive procedures.

Click here to read the full abstract.