OโLeary, who was continuing his return from a back injury that had kept him out of Irelandโs last two games in the RBS Six Nations Championship, was undergoing speed training with a sled when one of the straps failed, recoiled and struck him in the left eye.
This caused a bleed within the eye which affected his vision.
The bleeding has now stabilised and following an ophthalmology review it is anticipated that this will continue to improve. The situation will be reviewed on Friday and the current estimation is that OโLeary will be at least 2-3 weeks out of training while the condition settles.
Munster’s Peter Stringer looks likely to be included in the starting lineup following the substitution of Eoin Reddan after just a minute and half of the loss to Wales.
The team continue their preparations ahead of the clash with England on Saturday next.