The Head Light has some advantages vrs the head mirror: It produces a bright, uniform light and, once set, the head light needs no further adjustments. Thus, it quickly became the instrument of choice in the OR. And as headlights became lighter and smaller, yet ever brighter, many otolaryngologists now also prefer them in the office. Indeed, our BMC Clinic has no provision for the head mirror. You will have to use the head light.
The head light has three disadvantages: First, it requires a power source, but this is not much of a problem in the office. Second, it is usually bigger and heavier than the mirror, but not uncomfortably so.
The third disadvantage, parallax, is more serious. The users eye(s) and the light are on different paths.
Although the two never can become a unit, careful positioning of the light mitigates parallax:
First center the light between the eyes and exactly on the line connecting the pupils.
Next, make certain that the aim (direction) of the light co-insides with the intended line of sight.
A simple test is as follows:
Cup your hand, hold it with the thumb facing and at an appropriate distance, then test how well you can see an object within the cup of your hand. Adjust the light’s position as necessary:
Click to open video about the head light: