Field Analyser
Manufactured by Zeiss, it assesses the sensitivity of the retina across the central 60 degree of the visual field. It detects suble changes that might otherwise go undetected. During the test, lights of varying intensities appear in different parts of the visual field and the perception of these lights is charted and compared to healthy eyes of the same age in order to determine the extent of any damage to the retina.

Slit Lamp
The slit lamp is an instrument consisting of a high intensity light source that can be made to project a thin beam of light into the eye. This is then observed to give a magnified 3D view of the different parts of the eye. During the examination, our optometrist can look at the front parts of the eye, including the clear, outer covering (cornea), the lens coloured part (iris) and the front section of the gel-like vitreous that fills the globe of the eye. Special lenses can be placed between the slit lamp and the cornea to view deeper structures of the eye such as the optic nerve and retina.

Subjective Refraction
A vital part of correcting vision is the process of refraction – determining the level of correction that a patient requires. Subjective refraction is the traditional technique where the optometrist adjusts a series of corrective lenses to achieve the best visual acuity whilst viewing a variety of charts.

Tonometer
In order to ensure a person’s optic nerves are healthy, our optometrists check the pressure that is placed on them by the fluid in the eyes: the intraocular pressure.
The instrument used to check intraocular pressures is called a tonometer and is used to measure the intraocular pressure of aqueous humour, the liquid found inside the eye. Usually, the tests performed by a tonometer are simple, quick and painless.