half pairs

[finefocus]

What is the latest on the practicality of replacing only one lens? How well/poorly will the new lens match a month old lens? A year old lens?

[For-Life]

I would think that (but I am sure someone on the forum actually knows) it is still a bad move. Over time, the transition of a lens will tend to fatigue. So one lens may react differently than the other, if you only replace one lens. Even if it does not happen now, it could happen 6 months down the road.

[Jim Schafer]

Each case is unique. How much time does the patient spend outdoors?

The more time spent outdoors, the more likely you would need to replace both lenses.

In most cases of normal wear, I would say up to one year one lens can be replaced. If the patient is active outdoors and is not using sun wear, I would look at six months as the break point.

Again, each case is unique and dependent on the patients outdoor activities.

Jim