Search

CET and skills guides

Study and gain CET points through OT’s online CET exams, and access archived CET, CPD articles and skills guides in our education library

Find out more

Science and vision

News and features about the latest scientific developments and advances in optometry, ophthalmology and eye medicine

Find out more

Professional support

News and features about the latest developments relating to professional support from across optics. This includes updates from optical organisations such as the AOP and the GOC

Find out more

Jobs

Explore the latest UK and global jobs in the optical sector for optometrists, dispensing opticians and more

Find out more

Let there be light

Laser technique used in manufacturing could offer safer keratoconus treatment

Femtosecond laser

Scientists are reporting encouraging early results using a femtosecond laser to crosslink collagen in keratoconic corneal tissue.

The Massachusetts General Hospital research team said the laser technique, known as two-photon absorption, could replace the ultraviolet light currently used to crosslink collagen fibres and stiffen the damaged cornea.

Research leader, Dr Seok-Hyun Yun, said that using ultraviolet light had drawbacks, adding: “[It] comes with a risk of damaging the innermost layer of the cornea, a complication that changes the corneal function and can cause it to become very hazy.

“There is also no way to predict whether the procedure will actually improve vision in a given patient,” he emphasised.

The research, published in the journal Optica, found that, using titanium-sapphire femtosecond lasers, the team were able to successfully crosslink collagen for ten minutes without damaging the tissue samples.

Dr Yun said that more studies were needed, and noted that the femtosecond crosslinking was a time-consuming technique. It might be most useful to address damage in a small section of the cornea, he explained.

The laser technique had previously been used to harden the liquid resins in parts for microscopes, Dr Yun highlighted.

Advertisement