At around 11.15am on Tuesday (August 1), the victim heard the front door to her home in Staines Road opening.
After entering the living room, police say the suspect hit the woman over the head until she fell to the floor.
The man made off from the property and whilst police do not know at this point what exactly was stolen, they say it is likely to include a number of jewellery items.
Following the incident the woman was taken to hospital where she continues to undergo treatment.
The suspect is described as a white man of slim build, he is around 5ft 6ins tall and at the time of the incident was wearing dark clothing with his face covered.
Police are urging anyone with information relating to the incident to call Hounslow CID on 020 8247 6246 or via 101.
Those wishing to pass on information anonymously can do so by calling Crimestoppers on 0800 555 111.
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