There might be a risk (page 12 in the document below) and HIV post-exposure prophylaxis should be followed:
HIV post-exposure prophylaxis
Guidance from the UK Chief Medical Officers’ Expert
Advisory Group on AIDS
http://www.dh.gov.uk/prod_consum_dh/groups/dh_digitalassets/@dh/@en/documents/digitalasset/dh_089997.pdf
From what I know, apart from contact with intact skin this scenario is one of the lower risks managed in healthcare settings.
Mucosal contact isn't deemed as high risk as for example a needlestick injury.
It all totally depends on the setting this occurs in. Is this a rhetorical question or are you concerned about your own potential exposure?
In a healthcare setting an incident could occur where by infected blood comes directly into contact with the eyes straight from the patient. In a non-healthcare setting I can imagine the only incident where this may occur would be if someone was to spit in your face. Now this scenario, due to the presence of HIV inhibiting saliva is classed as a near enough negligble risk and nobody has ever been infected this way.
Bottom line is this is an extremely low risk exposure and post exposure protocols should be followed if in a healthcare setting and if non-healthcare, it does not warrant any concern whatsoever.