Another drug about which I am concerned is oxybuprocaine hydrochloride. I am referring to the Minister's Second Stage speech so I assume these are the three drugs he intends to be used. This is a topical anaesthetic that produces a surface anaesthesia lasting 20 to 30 minutes. That is fine, but at present I believe some opticians are using this drug to anaesthetise people's eyes while they test them for contact lenses. I was tested for contact lenses, and failed, but I do not think a local anaesthetic was used. One can only presume that the reason there is enthusiasm for allowing a local anaesthetic is that the opticians would like to be able to use an applanation tonometer to measure pressure within the eye rather than the puff tonometer used at the moment. The difference between the two is that the former touches the surface of the eye – the cornea – and the latter does not. The former is more accurate, but the other is also quite accurate. Opticians have been measuring tension within the eye for many years. Perhaps some glaucomas have been missed – I do not know – and this is why they want the applanation tonometer, but it is a big change.