But a specialist diagnosed a rare eye cancer and when surgeons operated they found 18 tumours in two-year-old Theo Hayeck's eye.
Since then he has lost his right eye and had nine months of chemotherapy.
But the new treatment leaves him blind for several days.
"He gets upset because he doesn't know where his mum or dad are," said the boy's aunt, Kate Simcock, matron at Mobberley's Barclay Park Nursing Home.
Next month Shaw Heath Social Club in Knutsford hosts an event to raise money for research into retino-blastoma.
Singer Katie Phillips will perform at the charity disco on September 8 when a signed Manchester City shirt will also be auctioned.
Tickets for the disco, which starts at 8pm, are £3.50 and are available from the Mobberley Road social club, Barclay Park Nursing Home or by calling 01565 872761.
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