AUTOREFRACTOMETER

It is a computerized device which automatically displays a refraction defect (number and axis of spectacle glasses needed by the patient). It is used in glasses examination. Measurement is made using this device before the patient is taken to medical examination room.

VISION SCREENER

It is a screening test that reveals whether there is any eye disease, such as myopia, hypermetropia, astigmatism or strabismus, in children. The test can be made in a few seconds using a hand-held device from a distance of one meter, like camera. The child is seated on a chair or if infant, on his relative's lap. The attention of child is caught with the sounds and colour lights coming from the device. After the device focuses on eyes, it automatically completes measurements in 1-3 seconds. The data is transferred to computer and then evaluated. It offers an easy and fast examination, which is an important advantage. The measurements can also be stored as in a video format. Two or three successive measurements increase the reliability of screening.

TONOMETER

Tonometer is a device that automatically performs the measurement of eye pressure. It measures eye pressure without contacting the eye. It blows air to the eye accompanied with a sound during the measurement. It does not present the risk of carrying infection between patients as it does not contact with the eye.

BIOMICROSCOPE

Biomicroscope is a device with a special design microscope and light source on it. It is a device that enlarges and examines the image of eye.

Doctor and patient sit down face to two sides of the biomicroscope. The patient leans his chin on the chin area and his forehead on a frame. The doctor looks through the microscope, moves the device back and forth and ensures clarity this way. A light is emitted from the biomicroscope to see the structures in the eye and the zoom of lens is increased if necessary.

When needed, some additions can be made to the biomicroscope and various eye examinations can be performed accordingly. For example, frontal camera angle and retina layer are examined using Goldman's three-mirror lens, eye pressure is measured using Goldmand's Applanation Tonometry and images can be recorded by an installed camera and video connection.

APPLANATION TONOMETRY

It is used for sensitive measurement of eye pressure. After an anaesthetic drop is used on the eye, measurement is performed by contacting the applanation device with the cornea. It is the most frequently used and most accurate tonometry. They are used by installing on biomicroscopes.

CHART PROJECTOR

It is a device that subjectively detects visual acuity of a patient. It is used by projecting on the screen against the patient the spares such as letters, numbers, and shapes of various sizes for children (e.g. butterfly, fish, and rabbit), 'E' letters with ends in different directions, and asking the patient to express what he sees.

LENSMETER

It is a device that measures the number of spectacle glasses and glass focuses. It is used to control whether the glasses is suitable for patient. It is a computerized device but manual versions can also be found in the market.

OPHTALMOSCOPE

It is a device that contains mirrors and lenses in it and uses electrical light source. It obtains about 10x zoomed flat image of eye ground. Ophthalmoscope is held about 15 cm away from the patient's eye and examination is performed by zooming in the device closely. Right hand and right eye are used for examination of right eye and left hand and left eye for the examination of left eye.

Firstly, optic nerve is examined when the patient is looking across. When the patient looks to the light of ophthalmoscope, macula appears on the monitor of doctor.

RETINOSCOPE AND SKIASCOPY BAR

These two devices are used in combination. They are used to detect refraction defects of the eye (number and axis of spectacle glasses needed by the patient) using a classical method.

VECTOR VISION

It is a method used to evaluate actual visual ability of patients with weak contrast sensitivity.