AIM: Cytological observation on pterygium was done with laser confocal microscopy HRT3 -RCM.

METHODS: Twenty pterygium eyes in twenty patients were observed with HRT3-RCM and the results were compared with the control group.

RESULTS: Vogt structure was not seen in pterygium area and that was instead by lots of collagen fibers and blood vessels.

CONCLUSION: HRT3-RCM which uses laser as light source is a new generation of confocal microscopy. It is a rapid, effective and noninvasive technique and it can be used for pterygium cytological observation.