The Role Of Ophthalmic Equipment


The eye is the window of the heart, the person needs to use the eye frequently in the life, and opens an eye clinic to need which ophthalmic equipment? We do not consider very common such as: vision, intraocular pressure, slit lights, etc., we look at the special inspection equipment?

1 Eyes AB Super

The eye's A is mainly measured the length of the eyeball, Ophthalmic Equipment including corneal thickness, anterior chamber depth, lens retinal thickness and so on.

b Super is two-dimensional, can see more things, mainly for the eyeball has no foreign bodies, whether there is vitreous opacity, after detachment, whether the retina has uplift, detachment and so on

2 fundus Photography

The Eye fundus photography is suitable for the fundus disease screening, the census and the diagnosis, especially applies in the diabetic retinal disease screening, the glaucoma screening, the healthy health examination and so on. No need to disperse pupil, can save patients and doctors time, Ophthalmic Equipment can increase the patient's dependence, do not affect the inspectors driving, travel and so on

3 Ultrasonic Biological Microscope UBM

Ultrasonic biological Microscope (UBM) is a kind of B type high frequency ultrasonic diagnostic instrument, which can be used in real-time to observe and study the related anatomy structure of living human eyes, and its resolution may reach the level of ordinary optical microscope. Ophthalmic Equipment It provides a noninvasive image of the anatomical structure of the eye angle and the ciliary body, so that doctors can clearly observe the anterior segment which could not be inspected with the naked eye and related equipment.

4 Field View Meter

The field of vision is a specialized ophthalmic instrument used in physiological teaching to determine eye vision and for the necessary determination of medical ophthalmic nerves. Ophthalmic Equipment Visual field examination plays an important role in the diagnosis and treatment of ophthalmic diseases. Visual field Examination provides important information for ophthalmic workers to diagnose and follow up the major blinding ophthalmopathy. No doubt, Ophthalmic Equipment visual inspection is the basic method to diagnose and monitor glaucoma and other visual and optic neuropathy.

5 electrophysiological

The visual electrophysiological examination technique, which can reflect the functional state of the visual system at different levels from different angles, Ophthalmic Equipment has the characteristics of non damage and objectivity, qualitative, quantitative, repeatable characteristics, in the diagnosis and identification of ophthalmic diseases, diagnosis of the prognosis of disease, efficacy evaluation, visual function assessment, disability identification and other aspects of the important role, Ophthalmic Equipment has been listed as a three-level hospital ophthalmology necessary inspection project. Visual electrophysiological is mainly used for: visual evoked potentials (visual evoked potential, VEP): Visual evoked potentials are a cluster of electrical signals that occur on visual stimuli in the occipital region of the cerebral cortex, representing the status of visual information transmission above ganglion cells. The examination will be three electrodes placed in the forehead, ears and back pillow, the patient watching the front of the TV screen, the entire inspection process only about 20 minutes, the patient easy to cooperate, no trauma, no pain. This examination is available for both the infirm and the infant. It can be used in the diagnosis of macular disease, optic neuropathy, glaucoma and objective visual acuity.

Electroretinogram (Electroretinogram, ERG): Electrical activity of the retina caused by light stimulation, called action potentials. Before the examination needs to scatter the big pupil, then the darkness adapts 20 minutes, the 5 electrodes respectively places the forehead one, two eyes outer canthus part each place one, each cornea places a contact electrode similar to contact lens. In the dark adaptation reaction, Ophthalmic Equipment the maximum mixing reaction, the OPS reaction, the electrode recorded the electrophysiological response of the retina to a curve after computer processing, and then after 20 minutes, the adaptive response was adjusted, and the 30Hz scintillation reaction was recorded. The entire inspection process takes approximately 2 hours. It can reflect the electrophysiological activity of each layer of retina and evaluate its function. The Electroretinogram are divided into flash electroretinogram and Electroretinogram. Flash Electroretinogram are derived from retinal photoreceptor cells, Ophthalmic Equipment and following its subsequent neuronal cells (but excluding ganglion cells), it reflects a variety of retinal diseases, including hereditary retinal disease, retinal circulatory disorders, retinal detachment, diabetic retinopathy, intraocular metallic foreign bodies, or other causes of retinal poisoning. The graphical electroretinogram is a form-aware stimulus instead of a simple light stimulation, and its waveform determines the functional state of the inner retina, so it is mainly used to detect the damage of ganglion cells caused by glaucoma and other ophthalmopathy.

The Ocular electrical graph (Electrooculogram, EOG) mainly reflects the function of the complex body of pigment epithelium and photoreceptor cell outer ganglia. Check the method with Electroretinogram. In clinic, EOG is used to evaluate the function of pigment epithelium and choroidal lesion, which has special diagnostic significance for yolk-like macular degeneration and other forms of adolescent macular degeneration, which is characterized by EOG reduction and erg normal.

6 fundus fluorescein angiography

Shows the examination method of fundus blood vessel. When the yellow fluorescein is injected into the vein, the fluorescein in the blood can clearly show the blood vessels in the fundus (including the pathological changes caused by diabetes), and finally, Ophthalmic Equipment the details of the fundus blood vessels can be photographed to analyze the abnormalities.

7 Study of coherence tomography (optical coherence tomography, OCT)

In ophthalmology, like the eye of the CT, can show the fundus of the image of the fault, providing us with a new window, so that we can from a new perspective to recognize and discover the fundus disease, especially for the diagnosis of macular disease.

(1) The OCT image clearly shows the location and level of the lesion, and the FFA shows the angiogram image after the tissue is superimposed. As a result, the OCT is superior to FFA at the level of the lesion. However, it should be noted that the fault image does not reach the molecular cell level, it is not equal to tissue sectioning.

(2) High resolution, axial resolution of 10μm, better than B-type ultrasonic examination (30~40μm).

(3) Measurement of tissue can reach micron level, Ophthalmic Equipment such as macular hole or macular edema.

(4) The use of near-infrared as the detection of light wave, can pass through the light turbidity of refractive interstitial.

(5) Check for non-contact, no trauma and flash feeling, easy to be accepted by patients.

(6) The pupil (4mm) can also be checked, but the effect of the pupil examination is better. The most distinctive feature is the ability to clearly present the cross-sectional images of the inspected parts.

8 Other equipment

Iolmaster, Eagle View, corneal map, corneal endothelial mirror, Oburg, Pentacam, eye instrument, etc.

Note: 1 ophthalmic equipment needs to be detailed model, each big model under the software version changes will cause a great change.

Note: 2 domestic ophthalmic instruments need to catch up, many are foreign ophthalmic equipment.