Contact Lens Options

All subjects wore Biofinity Multifocal “D” with a +2.50-D add power contact lenses, the same primary contact lenses used in the comparison group in the BLINK Study.⁴⁴ If a subject exhibited a poor fit (limbal exposure, excessive movement, or no movement) during follow-up, Proclear Multifocal “D” contact lenses were used as the alternative contact lens due to its similar optical profile to Biofiity Multifocal “D” contact lenses.⁴⁴ Table 2 lists the basic parameters of the Biofinity and Proclear Multifocal “D” contact lenses. Contact lenses, solutions, and contact lens cases were provided free of charge for all subjects. The initial contact lens power was determined by the spherical equivalent power (after referencing to the corneal plane) of the manifest refraction performed by a licensed study optometrist.⁴⁹ Over-refraction of the contact lens power was performed at each study visit and the contact lens prescription was updated if the over-refraction was greater than −0.50 D, or if the change was deemed to be clinically necessary. Study subjects were told to wear their contact lenses as often as they would like during waking hours (no overnight wear), and a pair of free or reduced-cost spectacles was also provided for the subjects. At each visit after the subject was enrolled in the study, the subject and parent completed surveys regarding their contact lens wear time during each week. Specifically, they were asked how many days they usually wore contact lenses and what time they usually inserted and removed contact lenses during weekdays and weekends, respectively. Parents were also asked what time the children typically woke up and went to sleep. Percentage of contact lens wear time during waking hours per week was then calculated based on the information. Additionally, the subjects were asked to rate their vision, comfort, and satisfaction with their contact lens wear.

Parameters for the primary and secondary contact lenses used in the BAM Study.