test

SCROLL DOWN

The Google Doodle Created in Honour of Ferdinand Monoyer

Book a free consultation

12
May
2017

Earlier this week on the 9th May an animated Google Doodle was created in honour of Ferdinand Monoyer’s 181st birthday. The doodle features a pair of eyes on the left, which form the ‘O’s in the word Google, alongside an eye chart on the right. As the eyes squint, the letters on the right become blurred. Monoyer is recognised for the development of the diopter; the unit of measurement for vision that is still used today!

The Google Doodle Created in Honour of Ferdinand Monoyer


Who was Ferdinand Monoyer?
Born in Lyon, France on the 9th May 1836, Monoyer rose to become one of France’s most famous ophthalmologists. During his impressive career, he served as an associate professor of medical physics at the University of Strasbourg from 1871.

Later, he was the director of the Ophthalmic Clinic of the Faculty of Medicine, the University of Nancy from 1872 to 1877. He was also Professor of medical physics at the Faculty of Medicine, the University of Lyon from 1877 to 1909.

What did he create?
A diopter is a unit of measurement for vision. The diopter measures the distance you’d have to be from text to read it. One of the most iconic forms of this is the decimal eye chart which features rows of letters that gradually go up in size.

Ferdinand Monoyer is also responsible for inventing one of the most commonly used eye charts back in 1872. Every row in the chart represents a different diopter, from smallest to largest. The pioneering ophthalmologist would ask patients to read up the chart until they could no longer distinguish characters.

The ophthalmologist also hid his own name inside the chart along either edge spelling out his first and last names, depicted in the Google Doodle. It appears when one reads vertically from bottom to top on each side.

The Monoyer chart has largely been replaced by the Snellen chart, which was invented soon after Monoyer’s and flips the chart on its head by placing the largest letters at the top.

The Google Doodle Created in Honour of Ferdinand Monoyer

Why is diopter important?
A diopter indicates how powerful a lens is in order to properly focus light on a person’s retina. It is officially defined as being “the inverse of a person’s focal length in metres.”

“A shortsighted person with a –1.00 diopter lens can see objects at one metre clearly before they become blurred. Similarly, someone with a –2.00 diopter measurement needs a lens that’s twice as powerful, meaning they can only see objects up to a 1/2 metre away clearly. A –3.00 lens would mean the person can only see a distance of up to 1/3 of a metre clearly, and so on. Most nearsighted people are in the range of -1.50 to -7.00 diopters.”

Wired reports:

“Alternatively, longsighted people who need a +1.00 diopter lens can see objects at one metre clearly, but anything closer than that is blurred.”


Sources:
Google
Wiki

By: David

If you are interested in vision correction at Focus Clinic please call us on 0207 307 8250 and book a free consultation.

Book your FREE consultation
Related Articles
  • Healthy Vision Month: spot the sun-seeker not wearing sunglasses

    Healthy Vision Month: Can you spot the sun-seeker not wearing any sunglasses?

    The summer months are slowly but surely on their way, so what better way to encourage sun-seekers to protect their vision than with a brainteaser with an eye-testing twist? With the sun fighting to get through the clouds, we’ve come up with this eye-boggling brain teaser that asks challengers to spot the sun-seeker that isn’t […]

    Learn more
  • pros and cons of laser eye surgery

    Pros and cons of laser eye surgery

    Pros and cons of laser eye surgery Despite the procedure being more than 25 years old, laser eye surgery is still regarded as a relatively new operation. The pros and cons of laser eye surgery can help a prospective patient decide if vision correction is right for them. Benefits and risks of vision correction It […]

    Learn more
  • how much does laser eye surgery cost

    Protecting your eyes from the sun

    Protecting your eyes from the sun As Britain sizzles in the hottest weather recorded since 2006, hundreds of thousands of people are set to get ready to attend some of the biggest summer events and make last minute holiday getaways. We know the dangers of unprotected skin from the sun’s rays, but what about ultraviolet […]

    Learn more
  • smart glasses

    The new smart glasses: you’ve never seen or heard anything like it

    We all know that glasses help us read more easily, but did you know there will soon be smart glasses that can read out loud what’s written in front of us on paper? A new Japanese company called Oton Glass are currently developing a pair of glasses that will be able to convert text into […]

    Learn more
  • Warning Signs of Vision Loss in Children

    Warning Signs of Vision Loss in Children

    It’s Children’s Eye Health and Safety Month (August) and the World Health Organisation has found that 19 million children in the world are visually impaired. Of this amount, 12 million are visually impaired due to refractive errors which can be easily diagnosed and corrected through a routine eye examination. Do you know how to spot the warning […]

    Learn more
  • Eye checks

    Why Glaucoma Awareness Week is important

    This week has been #GlaucomaAwarenessWeek which runs annually from June 12th-18th. Known as the silent thief of vision, Glaucoma is the leading cause of blindness – in many cases, up to 40% of sight is permanently lost before the symptoms are spotted. What is Glaucoma? Glaucoma is an eye condition in which the main nerve […]

    Learn more
  • stress

    Are you up to your eyes in it? Here’s how stress can impact your vision

    Stress.  We all feel it sometimes right? But perhaps you can’t seem to escape it?  Whether it is at work, home or school, did you know anxiety can have an impact on your vision too? The Times have recently discussed the negative impact of taking multiple exams over a long period of time on students’ […]

    Learn more
  • Eye yoga

    Eye yoga…top tips on improving vision and busting stress

    We have all heard of yoga as a form of exercise to improve our health and mind, but did you know eye yoga can do wonders to our vision too? Eye yoga enables us to use our eyes to their fullest capability, something which does not occur in our day-to-day life. Whilst many of us […]

    Learn more
  • night vision

    The reason why our ability to see at night goes back to evolution

    The cavemen days were a long, long time ago, but human bodily behaviour in the 21st century is still proving to have qualities that originate back to this period. One of these aspects, is our night vision abilities. New research conducted by Goethe University, Frankfurt, Germany, studied the brains of 14 males across six different […]

    Learn more
  • young people long-sightedness

    Age 18-30 and reading glasses

    The most common reason for vision issues for people from 18-30, who need glasses for reading (and who may wear glasses full time) is: Hyperopia, also known as long-sight / longsighted You may also have astigmatism, either alone or combined with long-sight How does hyperopia/long-sightedness develop? According to the National Eye Institute, hyperopia develops in […]

    Learn more
  • Woman glasses

    Do you take your glasses off before taking a selfie?

    Recent Focus Clinic research reveals that over half of all glasses-wearing women refuse to pose for a ‘selfie’ until they’ve taken off their specs first. The recent research suggests there’s still a negative stigma attached to wearing spectacles. Despite the fact that around 69 percent of all Brits wear corrective eyewear, many appear to want to […]

    Learn more
  • Colour Blindness: Symptoms & Treatments

    Colour Blindness: Symptoms and Treatments

    Do you have difficulty telling if colours are blue and yellow, or red and green? Do other people sometimes inform you that the colour you think you are seeing is wrong? If so, these are primary signs that you have a colour vision deficiency. Don’t worry if this is the case, as you’re not alone. […]

    Learn more
  • high cholesterol

    High cholesterol: Did you know it can damage your vision?

    Most people are aware that high cholesterol causes health issues, but many aren’t aware of the impact high cholesterol can have on your vision.

    Learn more
  • 5 Random Facts About Your Eyes

    5 Random Facts About Your Eyes

    Your eyes are one of the most fascinating and developed organs in your entire body. It takes half of your brain to control and process your vision and 80% of your memories are a result of what you have seen using them. We’ve put together some of our favourite fun facts about your eyes. 1) You […]

    Learn more
  • baby vision

    Baby vision: The development of sight from birth

    Baby vision! Have you ever looked at a baby and wondered what they are seeing, as they look around their new world with curiosity?  It turns out that babies ability to see is perhaps not as strong as you thought, with it taking up to two years for their vision to fully develop.  Just like […]

    Learn more
  • the 30 most iconic sunglasses of all time

    The 30 Most Iconic Sunglasses of All Time

    Monday the 27th June is National Sunglasses day, so we thought we'd take a look back at the most iconic sunglasses (and their wearers)!

    Learn more
  • black

    What is macular degeneration?

    This is a common eye disease linked to ageing that in time will destroys sharp, clear central vision due to damage to the retina. The retina is the very thin tissue that lives at the back of the eye and contains the light-sensing cells which are sending visual signals to the brain. Sharp, clear, ‘straight […]

    Learn more
  • what is astigmatism

    Smoking Yourself Blind

    It’s common knowledge that smoking is heavily linked to cancer and respiratory problems. What a lot of smokers don’t realise is that smoking is also linked to various eye conditions.

    Learn more
  • New

    The bionic eye

    Is science fiction becoming a reality? After years of intensive engineering a bionic eye has been approved for commercial use. Named the Argus II, it is a device that can improve sight for individuals who can see virtually nothing, making previously impossible tasks attainable. People with certain types of blindness can go from seeing virtually […]

    Learn more
  • child-allergies

    Eye Allergies to look out for in Children

    Children who suffer from allergies will often have symptoms such as sneezing, sniffling and nasal congestion - but if you find that their eyes are red, itchy, and swollen, there’s a good chance they might be suffering from an eye allergy too.

    Learn more
  • 920X1200

    Smart phones become eye-phones

    Researchers at Stanford University have developed two adaptors for smartphones that will allow the phones to take high quality images of both the front and the back of the eye. Currently these pictures need to be taken by a camera that is attached to a slit lamp. The slit lamp is a very expensive piece […]

    Learn more
  • eye health check-up

    9 Important Signs You Need An Eye Check-up

    Typically, optometrists and ophthalmologists recommend that most people go for an eye health check-up at least once every two years. The value of a regularly scheduled eye examination extends far beyond simply identifying a need for vision correction. In fact, periodic check-ups can also be useful in helping to diagnose other common medical conditions, both […]

    Learn more
  • world sight day

    Cataract surgery recovery

    Cataract surgery recovery Cataract surgery is the most common surgical procedure in the developed world. Recovery from a modern cataract operation is quick and typically uncomplicated due to the minimally invasive keyhole approach. No sutures are required and the procedure is performed as a day case without needing to stay in hospital. Who needs cataract […]

    Learn more
  • burning smell

    Burning smell during laser eye surgery? Don’t worry, your eyes aren’t burning

    Heard of a burning smell during laser eye surgery? Don’t worry your eyes aren’t burning! One of the main myths about laser eye surgery is that the burning smell many experience during their procedure means your eyes are burning.  You may have read comments such as “I could smell burning during the treatment” and been […]

    Learn more
  • spot potential sight issues

    How to spot potential sight issues in Children

    Most children won’t have any idea that they have a vision problem, so it’s up to us to be vigilant when it comes to noticing signs of potential trouble.

    Learn more
  • What are the Chances of an Infection After Laser

    What are the chances of an infection after laser eye surgery?

    Have you ever wondered what the likelihood of an infection is after laser vision correction?  In a study released by the Journal of Cataract & Refractive Surgery (JCRS) the risk of infectious keratitis in the eyes after laser vision correction was analysed. What is microbial keratitis? The condition is caused when the cornea, the clear, […]

    Learn more
  • What is Presbyopia

    What is presbyopia?

    Reading glasses and surgical options You can’t escape Presbyopia, the medical term for the loss of reading vision in middle age. Sadly, it will happen to us all eventually. Even if you’ve never had a vision problem before. It usually occurs around the ages of 45-50 in the UK, and earlier in warmer and more […]

    Learn more
  • floaters

    What are eye floaters & are they a concern?

    Most of us have seen strange shapes floating in our vision from time to time and those tiny spots, specks and flecks that drift aimlessly around our field of vision are otherwise known as floaters. What are floaters? Floaters are caused by small piece of debris that float in the vitreous humour of the eye. […]

    Learn more
  • The Principle Causes of Blindness

    The Principle Causes of Blindness Worldwide

    Worldwide, over 285 million people are estimated to be visually impaired: 39 million are blind and 246 million have low vision. About 90% of the world’s visually impaired live in low-income settings and 82% of people living with blindness are aged 50 and above. So what can cause Blindness? Multiple afflictions can affect the same […]

    Learn more
  • 1920--1200

    How an app can help the blind

    A smart phone app has been developed which will help blind and visually impaired people navigate their surroundings. Standard navigational apps currently use GPS and voice controls for directions which can run into problems in certain situations. For example, the directions can stop working when GPS is not available and voice directions can be drowned […]

    Learn more
Get in touch
  • This field is for validation purposes and should be left unchanged.
Thank you for getting in touch with Focus. Your message is on its way and one of our friendly team will be in touch shortly!
Reviews

Victoria

17th Jun

victoria

'I felt completely confident in Dr. Allamby’s abilities'

close
close
big close

Book a free* consultation

There is a refundable admin fee of £25 for consultations during the week and £50 for consultations in the weekend. This will be returned to you when you attend the appointment.
Thank you for getting in touch with Focus. Your message is on its way and one of our friendly team will be in touch shortly!

Would you rather speak to someone?

*Opening Times:
Monday - Friday: 9am – 6pm Saturday: 9am – 3pm

Would you rather speak to someone?

Call: 0207 307 8250

to arrange your free* consultation
There is a refundable admin fee of £25 for consultations during the week and £50 for consultations in the weekend. This will be returned to you when you attend the appointment.
Mr Samer Hamada
laser and lens eye surgery specialist
 Samar Hamada