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model: MS-101
ECONOMICAL OPTOMETRY SLIT LAMP MICROSCOPE
USA FDA REGISTERED
model: MS-102
OPTOMETRY - OPHTHALMOLOGY SLIT LAMP MICROSCOPE
USA FDA REGISTERED
model: MS-103
HIGH QUALITY OPHTHALMIC - OPHTHALMOLOGY SLIT LAMP MICROSCOPE
USA FDA REGISTERED
model: MS-104
DIGITAL OPHTHALMIC - OPHTHALMOLOGY SLIT LAMP MICROSCOPE
USA FDA REGISTERED
Slit Lamp: Biomicroscope at Work
To look at the anterior and posterior segments of the eyes, ophthalmologists and optometrists use the slit lamp microscope, which is a low power microscope, to aid them in detecting eye defects and even while performing eye surgery.

The slit lamp microscope is an ophthalmological equipment that uses a high-intensity light that shines through a narrow slit and onto the part of the eye the biomicroscope needs to focus on. With a binocular slit lamp microscope, it is possible to view a three dimensional or stereoscopic image of the human eye that will help ophthalmologists decide on the necessary treatment of the eye condition. Some biomicroscopes are also equipped with an ophthalmic instrument called an applanation tonometer which can be used to measure intraocular pressure (IOP). An increased IOP reading might mean that the patient has a high risk for developing glaucoma. An eye examination using the slit lamp biomicroscope is done to detect abnormalities in the structure of the eyes, as with cataract, uveitis, corneal injuries and other defects relating to the retina of the eye.

Before examining the eye under the biomicroscope, the ophthalmologist may stain the film on the surface of the eye to be able to distinguish the parts of the eye better. This would be done by patting a piece of paper with fluorescein (which is an orange-colored dye) to the side of the eye. Fluorescein can be washed away by natural tears, but patients wearing contact lenses should take them off since fluorescein can permanently dye lenses.

To look at the anterior or the front segment of the eye, the patient would have to sit in front of the slit lamp biomicroscope. There is a stage attached to the instrument where the patient can rest their chin and forehead so that the head wouldn’t move unnecessarily while the examination is being done. After the ophthalmologist has inspected the anterior segment, dilating drops would be placed on the eyes for the slit lamp microscope to be able to view the posterior or back segment of the eyes. Dilating drops would take about 15 to 20 minutes to take effect, and the patient may experience sensitivity to light after the eye examination for a few hours. In some rare cases, dilating drops may cause an increase in IOP. If the patient experiences nausea after the eye examination, it would be best for them to return to the ophthalmologist or optometrist at once.

To aid ophthalmologists performing eye surgery, a surgical slit lamp is indispensable in order to provide an accurate estimation of the thickness of the cornea. The old technique to do this was inserting an air bubble into the anterior segment to make a rough approximation of corneal thickness by calculating the distance between the reflection given off by the air bubble and the corneal surface blade being used. An operating microscope may also be able to zoom in onto the part of the eye the ophthalmologist would perform surgery on. Zoom capability are controlled by foot pedals attached to the surgical operating microscope so that the hands of the ophthalmologist can be left free to continue with the ophthalmic eye surgery.

Through the years much had been done to improve the design of the slit lamp microscope to make them more useful in eye surgery and successful eye operations. However, regular eye examinations are recommended in order for treatment to be done before the eye defect can worsen.