Amsler Grid

The Amsler grid is a useful tool to detect vision problems resulting from damage to the macula (the central part of the retina).

Report any irregularity to your eye care professional immediately.

The grid does not replace having your macula tested by an eye care professional, particularly if you are over 50 yrs old or have any risk factors for macular degeneration.

Amsler Grid

How to do it

  1. Cover one eye, then focus on the dot in the centre.
  2. Do any of the lines look wavy, blurred or distorted?
  3. Are there any missing areas or dark areas in the grid?
  4. Don't forget to test
    both eyes.

Dr David Worsley MB ChB, Dip. Obs,FRANZCO Back to About Us


Ophthalmologist at Hamilton Eye Clinic and Waikato Hospital, Hamilton

David graduated from Auckland Medical School in 1981 and undertook ophthalmology training in Auckland and Hamilton to become a Fellow of the Royal Australian and New Zealand College of Ophthalmologists in 1986. David undertook sub-specialty fellowship training in medical and surgical retina at Bristol Eye Hospital, England (1989-1991).

David returned to Hamilton in 1991 as a medical and surgical retinal specialist at Waikato Hospital and Hamilton Eye Clinic. He has a particular interest in the rapidly evolving treatments and prevention strategies for macular degeneration.  Research is of particular interest and David is very actively involved with two international biomedical companies aiming to develop new treatments for macular degeneration - early research with a drug for treating wet macular degeneration in combination with the current drugs (Avastin, Lucentis or Eylea), and research into retinal applications for a cell-based intraocular implant that has already commenced clinical trials in New Zealand for neurodegenerative brain disease. In 2013 David joined an international group of retinal laser specialists and now uses a novel nanosecond macula laser in New Zealand for the treatment of dry macular degeneration. David is also working with automated diabetic retinopathy photographic screening software being developed at Waikato University.

David is a medical advisory board member for Macular Degeneration New Zealand, Retina New Zealand and several international pharmaceutical and biomedical companies.

David’s areas of special expertise include:

  • Medical retinal conditions including macular degeneration and diabetic eye disease
  • Surgical retinal conditions
  • Retinal diagnostic imaging

Current Positions:

  • Consultant Ophthalmologist, Eye Clinic Waikato Hospital, Hamilton
  • Consultant Ophthalmologist, Hamilton Eye Clinic, Hamilton
  • Managing Director, Bridgewater Day Surgery, Hamilton
  • Researcher, Department of Physics and Engineering, Waikato University, Hamilton
  • Initial User Group, 2RT laser, Ellex Medical Lasers Ltd
  • Medical Advisory Board, Macular Degeneration New Zealand
  • Medical Advisory Board, Retina New Zealand
  • Medical Advisory: Ophthea Limited, Circadian Technologies Ltd, Living Cell Technologies Ltd, Alcon, Bayer



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Learn more about Macular Degeneration

Find out how MD affects the lives of real New Zealanders. Watch the video, learn about the risks and see how MD is a growing problem in our society.


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Map: Where is MD in NZ?

Age-related Macular Degeneration (AMD) is a growing problem in NZ. Total prevalence is predicted to be 206,908 in 2018.

View more

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Getting tested is simple

There is a quick and easy way to tell if MD affects your vision.  Click on the link below to see if you have the common warning signs.

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What you need to know

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What's the chance?

In New Zealand MD affects 1 in 7 people over the age of 50 years

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Smokers have 3 times the risk of developing MD and tend to develop MD 10 years earlier than non-smokers

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Is it getting worse?

It is estimated the number of people with MD will increase by 70% by 2030

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More common than you think

Age related Macular Degeneration is the most common cause of blindness

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You need to know!

Of those most at risk (50+) 67% have heard of MD and only 48% understand that it is an eye disorder. *Galaxy Poll March 2014

People with a family history of MD have a 50% chance of inheriting the genetic predisposition of developing MD.

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What if I don't have treatment?

Untreated, the majority of people with wet MD become functionally blind within 2 years

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