We are equipped with the most modern equipment to assess all eye conditions. Some conditions, such as glaucoma, require the use of our new, state of the art equipment.
The GDx scanner uses laser technology to measure the retinal nerve fibre layer (65,536 different points) to determine how "healthy" it is. The test is quick (2 to 3 minutes) and painless. It does not require pupil dilation.
The GDx scanner is able to detect glaucoma long before traditional examinations can. Visual field examination assesses the sensitivity of vision in the periphery and only becomes abnormal when some vision has been lost. By the time some vision is lost in the periphery, up to 40% of nerve fibres have already been lost.
Thus the GDx scanner is able to help in the diagnosis of glaucoma at an early stage, and also able to assist in evaluating the effectiveness of the medicines used to treat your glaucoma.
GDx scan of a retina
Our optical coherence tomography (OCT) scanner allows us to obtain high-resolution images of the posterior segment of the eye and the retina. It is essential in a modern ophthalmic clinic to accurately diagnose conditions such as age-related macular degeneration, macular oedema, and macular hole. Research indicates that the latest OCT scanners such as the I-Vue can be a valuable tool for monitoring the progression of glaucoma.
OCT scan of a retina
The Humphrey Field Analyser is the reference standard for assessing visual field abnormalities. ACES has a Humphrey Field Analyser in all of its clinic locations. As well as being used in the diagnosis of established glaucoma, it is also important in the assessment of visual loss from a wide variety of conditions such as stroke, brain tumour, and abnormalities of the optic nerve. The original field analysers used to take over 10 minutes per eye, but with modern software which we use, now takes 3-4 minutes on average.
As part of a standard cataract operation, an intraocular lens is inserted into the eye and we ensure that the intraocular lens is tailored precisely to each individual eye. To achieve this, we use the Nidek Biometry Scanner which measures the curvature of the front of the eye (cornea), and the length of the eye extremely accurately, to within a tenth of a millimetre.
Most eyes can be measured using the biometry scanner's light source, but this becomes inaccurate, or even impossible in patients with dense cataracts. Unusually, the Nidek Biometry Scanner also has its own ultrasound scanning source which enables an accurate intraocular lens to be calculated even for patients with dense cataracts.
Nd:YAG (neodymium-doped yttrium aluminium garnet) is a crystal that is used as a medium for solid-state lasers. Nd:YAG lasers are optically pumped using a flashtube or laser diodes. These are one of the most common types of laser, and are used for many different applications. Nd:YAG lasers typically emit light with a wavelength of 1064 nm in the infrared, thus making it invisible.
Nd:YAG lasers operate in both pulsed and continuous mode, but in ophthalmic surgery is usually used in Q-switched pulsed mode. The Q-switch is an optical switch within the laser which allows time for maximum power to develop before being emitted. Typical output powers are between 1 and 4.5 millijoule for 0.1 milliseconds.
Nd:YAG lasers are used in ophthalmology to treat posterior capsular opacification, a condition that may occur after cataract surgery, and for peripheral iridotomy in patients with acute angle-closure glaucoma, where it has superseded surgical iridectomy.