Advace Examination Instruments

ANGIOGRAPHY

It gives comprehensive information about retina layer of the eye. In particular, it helps in the diagnosis of diseases related to retinal vessels.

Following the enlargement of pupil with eye drop, sodium foreseen is injected via opening vascular access. Afterwards retinal vessels are observed about ten minutes.

Using angiography drugs may rarely cause allergic reactions. Inform your doctor in advance if you have a known allergy.

After operation there will be yellow-orange coloration in the skin, mouth and urine. This will be temporary and the drug excreted from your body with plenty of liquid intake.

The most common side effects are nausea, vomiting and rash usually does not require treatment. Moderate reactions are seen less often. Serious reactions are very rare. Anaphylactic shock is a situation that occurs with sudden drop in blood pressure.It may be occurring very rare.

COMPUTERIZED VISUAL FIELD SCAN (CVFS)

The visual field that the eye can see around a point when looking a fixed point right across the eye. Measurement and assessment of visual field is called the Visual Field Test. It is very important in detection and follow-up of glaucoma. Also, it is used in the follow-up of disorders like retina, optical nerve, ortibatumors, brain tumors, migraine, and thyroid. The patient is asked to wear farsightedness glasses during the visual field test.

The test takes about 20 minutes per eye. The patient is shown photos with low brightness in a dark environment. The photos continuously change places and brightness of light is very apparent at times and very pale to notice. The patient continuously and fixedly looks at a point and pushes on the button every time he/she sees these photos without moving his/her eye in any direction. The CVFS test cannot be applied in infants and persons with disabilities since it requires cooperation of the patient.

In addition, there is also a simple vision field test, called confrontation test, which can be performed without devices. During this test, patient and doctor sit face to face.

BIOMETRY

Biometry is a procedure of calculation that is performed before the cataract operation by measuring the length of eye from front to back as well as keratometric values of the cornea. The number of lens (dioptre power) that will be attached in the eye is determined with this measurement and calculation. It enables reliable and decisive analysis of cornea curve with the multi-marking method. With a single measurement, it allows for a complete biometric evaluation which includes lens thickness, lens position and retinal thickness. Its software supports measuring pupil width of the patient. The measured pupil wide is used as basic variable for phakic and multifocalintraocular lenses as well as laser reactive surgery.

Intended Uses:

A-Ultrasonic (A-scan/B-scan) Biometry: Ultrasonography ensures thinning of intraocular lens, vitreous and retina by means of sound waves coming from a prob that is contacted with eye. It can be performed in two different modes: A-scan and B-scan. A-scan measures front and rear lengths of structures like cornea, anterior chamber, lens and vitre. It is especially important in the measurement of degrees of intraocular lenses which will be used in cataract operations. On the other hand, B-scan provides two-dimensional image of intraocular structures. It is used in the detection of retinal detachments, decollement, intraocular foreign objects or eye neoplasm's.

B-Optical Biometry: This is a sensitive method but the biggest disadvantage is that no measurement is made in majority of cataracts in Turkey. It is preferred in non-advanced cataracts. It is performed without any contact with patient and in the sitting position.

OPTICAL COHERENCE TOMOGRAPHY (OCT)

Comment;Optical coherence tomography (OCT) is a new imaging technique that is capable of providing cross sectional images of the retinal anatomy. It provides retina and three-dimensional macula assessment, high-resolution retina map, inner and outer retina thickness maps and optical disk nerve fiber assessment in glaucoma, optic nerve and retina disorders. In the anterior segment surgery, it offers three-dimensional imaging of cornea by cornea thickness analysis.

The OCT is a completely harmless technique. It can be applied in 2-3 minutes without touching the patient's eye. No intravenous administration is required unlike the eye angiography. The OCT also supports making retina thickness measurements and evaluating macula edema which may occur especially in diabetes and after operation.

The OCT is important in retinal haemorrhage, new vascularisations, inner retina effusion, cystoid macular edema, and retinitis pigmentosa which cause thinning in macula holes, epiretinal membranes and retina layers. Also, the OCT gives important information in the regulation of MS (Multiple Sclerosis) and Alzheimer's disease thanks to its special software.

ANTERIOR SEGMENT IMAGING

They are the devices that take the photo of eyelid or anterior segment. It is an examination required before surgical procedures such as ectropion, blepharoplasty, IOL correction, trichiasis, electrolysis, cyst excision, mass excision, pterygium and ptozis.

Anterior segment imaging is very important in the follow up of corneal abscess and ulcers.

PAKYMETRY

Pachymeter is used to measure the thickness of cornea by means of ultrasonic waves. It is a short and easy procedure.

The measurement is cornea thickness is important for those with high intraocular pressure. If high intraocular pressure does not cause any visual impairment, any impairment in visual field or any damage in optic nerve, then it is difficult to suggest the presence of glaucoma. These patients are followed up closely or some doctors prefer treatment. Recent studies highlight that intraocular pressure can be measured high in those with high cornea thickness. It moves away from the diagnosis of glaucoma in patients with suspicious cornea thickness measurement, while it enables finding out those who are misdiagnosed with glaucoma.

SPECULAR BIOMICROSCOPE

Specular microscope is a device that gives information about the health of transparent cornea layer. The endothelial, backmost layer of cornea consists of uniserial hexagonal cells and their numbers do not increase as from the birth. In case of frontal segment operations of the eye, such as cataract extraction, the number of cornea endothelium may decrease. Other cells expand and cover the place of dead cells. Specular Microscopy is the process of counting these endothelial cells. It is an easy and short procedure.

A decrease in number of endothelial cells causes the cornea to lose its transparency and decreases vision level. Also, it may result in complaints such as pain or biting in the eye. In this case, cornea transfer may be needed. Main factors which decrease the number of cornea endothelial cells include age, intraocular operations (cataract operations, phakic intraocular lens), some disorders of cornea (Fuchs-guttata, keratoconus etc.) and Contact Lens Related Endotheliopathy (CLRE).

Specular microscope gives us very sensitive information about the quality and quantity of endothelial cells, which cannot be measures by means of biomicroscopy or corneal topography but are very important and critical for the cornea. It also helps us determine additional measures to be taken during operations to make sure this tissue is not damaged further or the way of selection and use of contact lenses of the patients.

TOPOGRAPHY

In cataract surgery, Lasik and other astigmatism treatments is an important guidance for to us to investigation. Topography is a diagnosis method that gives information about the structure of cornea. It is the most advanced corneal topography system today that offers the most advanced examination in all kinds of surgery related to cornea and generates three-dimensional maps. It offers a unique imaging feature by generating height map of back surface as well as the front surface. It also provides refraction and thickness values for each point of cornea. It is an important diagnosis method which is need before surgical treatment of cornea and follow-up of patients with keratoconus cornea.

WAVEFRONT

The Wavefront system generates a detailed map of your eye. Thanks to this special system, eye structure of a person is examined in detail and a treatment method is developed specific to that person. Every person has a different eye sight and eye structure, just like fingerprint or DNA. Therefore, although the applied system is the same, it is possible to fail to achieve the same. The Wavefront-directed personal laser application offers high success rate.