Other Services

Other Services


Orthokeratology – Correcting Vision While You Sleep


This technique turns contact lens fitting on its head! Special rigid gas permeable contact lenses are worn at night so no correction is needed during the day. Overnight wear has a temporary molding effect on the cornea (the front surface of the eye) to flatten the eye and reduce low degrees of myopia.

Suitable candidates have the beginning stages of shortsightedness or myopia and do not want to wear contact lenses or spectacles during the day. Soft contact lens wearers who suffer discomfort during the day like this form of vision correction.

Ortho K, as it is commonly known as, depends on two things to have its precise effect: firstly corneal topography to map the front surface of the eye and secondly new generation contact lenses made on computerised lathes to create the special curves. The effect on the cornea is gentle as there is hydrostatic pressure and suction zones accurately centred on the cornea.

Clearer unaided vision starts after the first night of wear. The lenses need to be worn every night to maintain the refractive effect.

This gives freedom from spectacles and is an alternative to laser refractive surgery.

Visual Stress & Coloured Lenses



A percentage of the population is sensitive to black print on a white page, creating distortion whist reading and affecting their ability to learn and concentrate. Precision tinted lenses assist by alleviating the symptoms.

Symptoms of vision stress – all or some of:

  • Movement of print
  • Blurring of print
  • Letters changing shape or size
  • Letters fading or becoming darker
  • Patterns appearing, sometimes describes as “worms” or “rivers” running through print
  • Illusions of colour – blobs of colour on the page or colours surrounding letters or words
  • Rapid tiring
  • Headache, migraine or eyestrain

We use the Intuitive Colorimeter to determine the best precision colour tint to reduce visual sensitivity. The precision of the colorimetry instrument is used in conjunction with behavioural optometry techniques to achieve optimum results.

We do not diagnose dyslexia or attention deficit disorder, but where appropriate we can recommend strategies to minimise associated symptoms and difficulties.

Some people are more photosensitive than others, colour effect has been associated with metabolic and mitochondrial conditions such as migraines and fatigue syndromes. It is postulated that precision tinted lenses can reduce hyper-activation in the visual cortex of the brain.

Hypersensitive Eyes & Vision


Our practice is known for assisting people with sensitive visual systems who are not comfortable with their vision or how their eyes feel or perform. We look beyond regular eyesight testing to help manage symptoms.

Your symptoms may include:

  • Eyes and vision not feeling ‘just right’- not connected
  • Glare sensitivity, problems with bright or fluorescent light
  • Rapid eye fatigue
  • Difficulty reading for long periods of time
  • Shadowing or slight doubling of vision
  • More dry eyes, sore eyes and headaches


The emphasis is greater than your letter chart ability or what your conventional glasses prescription may be. Comprehensive binocular vision testing assesses vergences, heterophoria, pursuits and saccades. These measurements give insight to the spatial elements of vision: how you move through space or how you localise where to look.

Our clients are more prone to dizziness, sinus, migraines, anxiety and often have a history of TBI or medical issues.

We use prisms, tints, filters and vision therapy to reduce and manage symptoms. Multi-disciplinary care is important, with other healthcare practitioners involved as there are often non visual complaints to consider. Lifestyle factors and interventions are often key to getting better and performing the best you can.

Syntonic Light Therapy


The use of Syntonic Light Therapy in our practice is to enhance the effects of vision therapy and create quicker change. The concept is to balance the visual components of the autonomic nervous system which regulates spatial awareness and perceptual fields. Under visual stress, perceptual fields can narrow limiting the volume of information that can be taken in automatically. Syntonic Light Therapy is the use of visible light frequencies or colour, through the eyes to enhance visual attention and the ability to comprehend what we see. Light entering the eyes not only allows us to see but also influences important brain centres such as the hypothalamus and pineal gland (via the non-visual pathways).

Utilising Syntonic specific colour filters is useful to break old visual habits, the process also supports a better awareness in where the eyes are pointing, therefore enhancing functional eye movement skills, this leads to being able to take in more information at a faster rate.

Syntonic Light Therapy, and the use of light and colour,  can be used as an adjunctive therapy where there are:

  • Learning difficulties
  • Dyslexia
  • Focusing and convergence problems
  • Visual stress
  • Sports vision
  • Motion sickness
  • Photophobic (glare sensitive)


Symptoms of a limited perceptual visual field includes loss of place while reading, skipping of lines or words, reduced comprehension and print moving on the page. A reduced perceptual field affects all aspects of daily living including academic and athletic performance.

Sleeman Optometry

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