Diabetics could soon be wearing contact lenses that warn them when their blood sugar level is dangerously high or low.
Scientists are developing the devices that use ’sensor hologram’ technology that senses the glucose levels so sufferers will no longer have to take blood samples daily.
The new system involves special contact lenses which sense the glucose levels in the tear fluid of the wearer’s eye, which may be linked to the concentration of glucose in the blood.
Changes in the glucose level in the tear fluid alter the wavelength of light reflected by the ’sensor hologram’ in the contact lens, and this can be detected by a small device held up to the eye to give an accurate reading of the wearer’s glucose level.
The painless system will allow diabetics to monitor their glucose levels more often, leading to better blood sugar control and fewer health problems.