Through a shark’s eyes

Through a shark’s eyes

Posted on 08th May 2015

The Shark documentary on BBC 1 last night was fascinating (and a pleasant break from GE coverage!). Sharks have a bad reputation, not least as a result of the 1970’s blockbuster, Jaws. But actually they are a species that pose very little threat to humans and instead are truly majestic creatures.

Caribbean_reef_shark

You may think this is a little off topic. What do they have to do with the human eye? Well you might be surprised to learn that the shark’s eye structure is very similar to that of a human’s eye with a cornea, lens, retina, pupil and iris. In fact so similar that the shark cornea has been used in human eye surgery.

However the eye surround is very different. Many sharks don’t blink, they just use their eyelids when they need protection and rarely close their eyes. Some don’t even have eyelids, instead species like the great white roll their eyes into their head when they need protection, usually when feeding. They also have the ability to see in the dark due to the eye tissue called the tapetum lucidum which can lead to their eyes appearing to glow in the dark, much like the household cat.

From the goblin shark to the tasselled wobbegong, there is a lot more to the species than the great white which stole the show in the Steven Spielberg thriller. We need to preserve the lives and habitats of this remarkable predator.


Related Posts

Eyewear boutique summer event

23rd June 2017

Last night we held our summer frame preview event in our independent eyewear boutique. Thank you to all who attended. We loved seeing so many guests experimenting with different styles and looking utt...

Read more

We’ve been shortlisted for another award

09th June 2017

We're thrilled to learn Ian Cameron has been shortlisted for the BCLA's (British Contact Lens Association) Dry Eye Award. For those who have experienced dry eye (ocular surface disease), you will know...

Read more

Cameron Optometry represented at conference for international contact lens specialists

08th June 2017

Former managing director and founder of Cameron Optometry, Donald Cameron, attended the International Society of Contact Lens Specialists (ISCLS), along with Ian Cameron. Here Donald shares some of th...

Read more

Practice manager Carol completes the Edinburgh Marathon (by accident!)

29th May 2017

For patients of the practice, you will know Carol Field, our dispensing practice manager. On Sunday Carol did something amazing. Carol completed the Edinburgh Marathon. The reason this is a particula...

Read more