The College of Optometrists

at the cl exam i fitted my rgp lens and when looking with white light movement looked sufficient the lens was lid attached and centered well with out lide attachment, however when i put fl in it all went wrong as the lens movement was good but all the fl pooled in the centre then dropped to mid periphery and because of the time constraint and not allowing settling time i interpreted it as a flat fit and said i woukd go a fitting step steeper according to my diagnostic set which is 0.1mm now im thinking it was actually steep but how can a lens be steep and move a lot? and after the fl reduced the whole pattern was different so have i failed if i wrote 0.1mm steeper? as the examiner said but i fittin step is 0.05mm and i said yes but based on my fiitin set one change is 7.70 to 7.60 have i failed due to this?

I don't know -

But lots of GP lenses look flat when the eye is flooded with fl - just as you say. So its a simple mistake anyone could have made.

If it pools centrally and and drops towards the periphery -it sounds like a possible slightly 'steep' fit - called 'apically clear'.

Maybe it was that - dunno.

Steep lenses can move - that would depend on the lens diameter and on the size of the corneal apical zone (smaller zone = greater movement.)

-steve

As the lenses do not have time to settle in the exam to any great extent, there is usually still quite a lot of reflex tearing, not helped by adding a dollop of flourescein, it is not unusual to see a steep fitting lens when looking at the flourescein picture moving more than you might normally expect. Unfortunately for you the examiners are expecting that candidates who understand about the changes RGPs can cause take that into account and judge on the flourescein picture rather than the movement. You may be fine and have misjudged your performance but I have to say a candidate assessing an RGP as too flat when it is actually steep would be a reason to consider failing them. You will of course find out on the 24th, I wish you luck!