When we go to the ophthalmology department of a hospital because of eye discomfort, why do doctors ask us to do a series of tests first? The eyes are closely related to all organs of the body, and many diseases are often reflected through the eyes, such as problems with the fundus, or cataracts in the eyes as we age. Let’s take a look at the significance of each eye examination. 1.Why do I need a slit lamp examination for an eye visit? Slit lamp examination can clearly observe the eyelid, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, lens and the anterior 1/3 of the vitreous, and can determine the location, nature, size and depth of the lesion. Therefore, slit lamp examination is an essential and important part of ophthalmic examination. 2.Why do I need to check my vision first for ophthalmology consultation? One of the main symptoms of eye disease is vision loss, and vision examination is an important basis for the detection and diagnosis of eye disease. 3.Why is it necessary to check the fundus of the eyes during an ophthalmology consultation? The eyes are closely related to all organs of the body and many diseases are often reflected in the fundus of the eyes. Doctors can see the vitreous humor, retina, optic nerve papillae and retinal arteries and veins with the use of ophthalmoscopy, and can find out any abnormalities from the tissue structure, morphology and vascular changes of the retina, so as to deduce what diseases the patient has. Fundus examination is not only important for the diagnosis of ophthalmic diseases, but also can detect different fundus manifestations, and make diagnosis or provide clues for certain systemic diseases, especially medical and neurological diseases. 4.Why is it necessary to measure IOP for ophthalmology consultation? Glaucoma is caused by damage to the optic nerve and atrophy due to high intraocular pressure, resulting in various visual impairments and visual field deficits. The eye pressure test is one of the three most important tests to detect glaucoma and is also the simplest test. Therefore, patients should have an IOP test to rule out the possibility of high IOP and glaucoma for early detection and treatment.