An eye treatment apparatus having a guide device structured to guide a nozzle of an applicator to a position in front of an eye is provided. The guide device includes a guide surface and a stop. The guide surface is easily accessible. That is, the nozzle of an applicator may be moved, generally laterally, into contact with the guide surface. The nozzle may then slide over the guide surface to the stop. The stop is positioned so that the nozzle is disposed centrally in front of the eye.