Biomedics 1 Day Extra 90-pack

Which base curve to choose, 8.6 or 8.8? If you have a negative prescription, choose 8.6, and if you have a positive prescription, choose 8.8.  (Negative prescriptions are only available in 8.6, and positive prescriptions are only available in 8.8.)

This is the new version of Biomedics 1 Day. You can switch to it without needing a new fitting from the optometrist. Wearing daily contact lenses is a hygienic and very convenient alternative. No issues with expensive solutions, disinfecting storage cases, irritating deposits, or time-consuming cleaning hassles.

Specifications
Model	Biomedics 1 day Extra
Quantity	90 lenses per box
Manufacturer	Coopervision
Available Strengths (Strength is often indicated by PWR or SPH on the box)	+6.00 to -10.00
Base Curve (also referred to as BC or Radius)	8.6 for negative prescriptions and 8.8 for positive prescriptions.
Diameter	14.2
Wear Time	1 day
Material	Ocufilcon D
Water Content	55%
Handling Tint	Yes, light blue
UV Protection	No