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The complexities of the human eye – from the blind spot and macula to focused and peripheral vision

The complexities of the human eye – from the blind spot and macula to focused and peripheral vision

How our brain compensates for perplexing design flaws in the human eye.

Over the course of the last 500 million years, evolution has produced an incredible variety of different eyes from a simple light-sensitive spot. This has proved to be a major evolutionary step, because sighted creatures enjoy clear advantages over blind species. Researchers remain divided on whether this variety stems from...

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Everything You Should Know about Your New ZEISS Precision Lenses

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Eye & Vision

 

What is the eye's centre of rotation?

What is the eye's centre of rotation?

A special point in the eye plays more than a secondary role in the production of ZEISS spectacle lenses
Did you know that a special point in the eye – its centre of rotation – plays a key role at ZEISS in the optimisation of precision spectacle lenses? This can be of decisive importance in determining the...

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Why do people see differently?

Why do people see differently?

Richer colours, better night vision, enhanced contrast – for better use of our full vision potential.
Whether colour perception, 3D vision or night vision: they all vary from one person to the next. Why does visual performance vary so much from one person to another – and how can we improve our eyesight...

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Ophthalmic optics today: How optical consultation has changed over the past 10 years

Volker Meyer and Heinrich Rath from Aalen University in Germany, spoke with BETTER VISION
In the 13th century Italian monks fashioned the predecessors of our modern spectacles from partially ground lenses made of beryl crystals found in the mountains. Much has changed since then with regard...

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Optical Illusions

Do you see it?
Eyes are our most important sensory organs because we usually only believe something when we actually see it with our own eyes. The Greek philosopher Plato explained why we should not always trust our...

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What is colour blindness and what can people affected by it do?

A genetic defect is the reason that 180 million people worldwide are colour-blind. Doctors distinguish various degrees of severity.
Most commonly encountered are those who cannot confidently distinguish the colours red and green. This is called colour blindness. Fortunately, complete colour blindness is rare. Those affected are only...

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How do our eyes smile?

Whether we are wearing spectacles or not, our eyes are a significant factor in how we communicate. Here are our top 3 tips for spectacles wearers to achieve smiling eyes.
Laughing is good for us – because a really good laugh uses as many as 100 muscles in our body and face. Eye contact and smiling eyes also significantly facilitate our communication with other people. But...

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Better Vision for Seniors

Anyone who is over 40 usually needs a pair of glasses. Progressive addition lenses can restore 20/20 vision.
All of a sudden, you might have trouble pushing a thread through the eye of the needle or you may have to hold your newspaper far away from your face so that you can read it. These are the first signs...

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Everything in View at the Computer Work Station

Why special reading spectacles/varifocals can make your work easier
Reading spectacles are often not ideal for desk work. You can see everything clearly when reading documents, but when a colleague walks through the door you cannot quite recognise him/her or you have difficulty...

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Excellent vision despite eye problems

Our eyes are our most important sources of perception – consequently, any eye disease needs instant attention
Our eyes perform precision work all the time. They focus on objects that are close-up, zoom in on those off at a distance and have to adjust to different lighting conditions over and over again. We take...

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What to do if you have vision challenges

Do you have 20/20 vision or are you nearsighted, or farsighted? Do you have age-related vision impairments? A vision test will provide all the answers.
Human eyes can differentiate between several thousand colours, assess the speed of a flying tennis ball and recognise letters as well as images in less than a fraction of a second. However, all of this...

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Get the best protection for your eyes

Very sensitive and completely irreplaceable: Hazards to the eye are manifold and can entail disastrous consequences
Anything could happen to our eyes in an instant, whether at the workplace or while engaging in recreation and sports. It is certain that our sight organs are too valuable to expose them to any unnecessary...

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Our eyes – our windows to the world

Our eyes function like a camera in which numerous parts work together perfectly. This is good news, because vision is our most important sense
For most people, it’s a matter of course: You open your eyes and you see the world. When the alarm clock goes off, you see the red numbers, the colour of the bedspread and your pyjamas, the green leaves...

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The eyes of our children

When a child is born, it can see instantly. However, its visual acuity does have to develop over time.
The newborn’s eyes are beaming, a smile brightens up its face – those are among the most amazing moments for a mother as she holds her baby in her arms. At this stage the baby’s eyes are still developing...

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