Adapting to New Spectacles
Some people are analytical by nature. While this characteristic can be very useful in situations which require careful evaluation, it can have a "paralysing effect" in others which can be managed most efficiently without detailed observation.
Strange as it may seem this trait can affect vision, particularly our ability to adapt to new spectacles. Most of us assume that what we "see" is a "true" representation of reality. However, our visual world is constantly changing. For example, if we view an approaching motor car the image that the eye is receiving is constantly enlarging. If no visual adjustment were made the motor car would appear to be increasing in size as it approached. Fortunately, the visual part of the brain is able to make adjustments to eliminate this "error" so that we judge the car to be closer rather than bigger.
While all spectacle lenses cause optical distortion, it is most noticeable in bifocals and multifocals. Digitally designed and manufactured lenses minimise distortion, but it is not possible to eliminate this entirely.
Fortunately, the brain's natural ability to adapt the visual image compensates for this "distortion", which usually takes from a few days to several weeks. While this adjustment period is affected by the "strength" and type of lens, the most important factor is the flexibility of the visual part of the brain to adjust for the distortion. Wearers who possess the ability to "go with the flow" are able to adapt more quickly than those who tend to focus on the visual distortion.