In what would be a big blow to the world champions in the forthcoming one-day series, Gambhir is likely to suffer the fate of the likes of Zaheer Khan, Yuvraj Singh, Harbhajan Singh and Virender Sehwag who came or joined the Indian squad and left without lending significantly to the team's cause.
India have been whitewashed 0-4 in the Test series, lost their number one Test rankings and are in danger of suffering a similar debilitating fate in the one-day series, starting with the first game in Chester-le-Street on 3 September.
Gambhir had backpedalled to catch a pull by Kevin Pietersen at mid-on on the second day of the final Test at the Oval on 19 August, tripped and fell on his head and subsequently suffered from a blurred vision.
Gambhir didn't open in both innings of the Oval Test and came down late in the order, contributing little by way of runs.
Since then, Gambhir has visited doctors and got MRI scans done which have shown clean results yet Gambhir's condition hasn't improved.
Gambhir's case could be similar to the one suffered by South African fast bowler Dale Steyn during the Champions League last year when he too had backpedalled to take a catch off Michael Hussey in a semi-final clash between Chennai Super Kings and Royal Challengers Bangalore.
The pacer fell on his head and Steyn's MRI scans too showed little but the paceman took three-four weeks to get himself sorted out.
By the looks of it, Gambhir could also suffer a similar fate and be out of action for three-four weeks, putting in doubt even his participation when England pay a return visit to India for a one-day series in early October.