CET feedback: RGP interactive

It is some 20 years now since the advent of silicone hydrogel contact lenses – I feel so old. Around this time, several contact lens authorities perhaps most notably Professor Nathan Efron, were openly suggesting that this would be the death of RGP contact lenses. Their benefits in terms of oxygen provision and optical stability, it was mooted, might no longer be sufficient (now that oxygen flux had in effect been addressed by the newer material) to overcome the several perceived challenges of RGP lenses. These challenges usually focused on the comfort of the lenses and the required adaptation required for long term successful wear. But others often cited included the need for compliance with care systems (daily RGPs are not a viable option), possible mechanical impact upon the eye and adnexae and issues to do with handling, deposits and surface quality.