Tour

	Queens Eye Center is located at 60-10 Main Street in Flushing. The main entrance is on the corner of Main Street and the west-bound Horace Harding expressway.
	Optometrist, Chang Li, evaluates a patient in the refraction exam room.
	Our ophthalmic assistant is seen at the console of the Heidelberg Retinal Tomography machine. The device is a laser scanning microscope for acquisition and analysis of three-dimensional images of the retina. It enables the quantitative assessment of the retinal topography and precise follow-up of changes. The most important clinical routine application of this is the topographic description and follow-up of the optic nerve head in glaucoma.
	Ultrasound and computer technology are critical to the modern practice of ophthalmology. Equipment like that shown here is regularly used in 'A scan' mode to measure the length of the eye in cataract patients.
	In patients with dense cataracts, light is blocked by the abnormal lens and can not be shown into the back of the eye. Doctors circumvent this problem by using a 'B scan' ultrasound study to 'see' the vitreous and retina behind the cataract.
	The Heidelberg Retina Tomograph uses a diode laser with a wavelength of 670Ýnm. A three-dimensional image is acquired as 32 consecutive and equidistant optical section images, each consisting of 256Ý‰~Ý256 picture elements. Pupil dilation is not necessary.
	Dr. Sangwoo Lee, Medical Director, our retinal specialist, prepares to use a retinal laser.

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