Otoscopy
A GP might be able to see fluid present from a visual inspection of the eardrum using an otoscope. This handheld device has a magnifying glass and light. If the eardrum is not obscured by wax, it is possible to see if there are signs of infection or fluid in the middle ear.
On the right, bubbles of fluid can be seen behind the eardrum compared to a healthy eardrum (left).
Interpretation can vary so tympanometry is needed to check if there is fluid in the middle ear.
A hearing loss due to Glue Ear cannot be diagnosed without a hearing test.