People paying for contact lenses through international private medical insurance policies should ensure they discover a good optician.
Sports vision specialist Gavin Rebello, who tweets at @eye_performance, pointed out everyone's eyes are different.
"One lens that works well for one person doesn't necessarily work best for another," he continued.
The expert advised people to remember they "only have one set of eyes" and said while there are many special offers available in opticians, "you get what you pay for".
Finding the right eye care professional is the only way to get "clear, comfortable lenses that work for you", Mr Rebello noted.
He recommended finding the best optician through word-of-mouth.
Some individuals have a tear fluid that dries out more quickly than others who produce a more watery substance, the specialist declared, pointing out this can influence whether or not contact lenses will dry out.
Recently, Mr Rebello pointed out modern lenses are safe for people to wear, noting the devices are comfortable, soft and do not get "lost behind the eye".