cells and flare is a slit-lamp exam finding that signals inflammation inside the front part of the eye. “Cells” are tiny inflammatory cells seen floating in the aqueous fluid of the anterior chamber. “Flare” is a hazy light-scattering effect caused by increased protein in that same fluid. It is most commonly used to detect and monitor conditions like uveitis and postoperative inflammation.

hypopyon is a visible layer of white blood cells (pus-like inflammatory material) that settles in the front chamber of the eye. It appears as a whitish or yellowish fluid level behind the cornea. It is most commonly discussed in eye exams when clinicians evaluate severe inflammation or infection. The term is used in ophthalmology and optometry to describe a sign, not a diagnosis by itself.

hyphema is blood inside the front chamber of the eye, in the space between the cornea and the iris. It is most commonly seen after eye trauma, but it can also occur from certain eye or blood conditions. Clinicians use the term hyphema when documenting exams, monitoring risk, and planning management. Patients may notice blurred vision, light sensitivity, or a visible “pool” of blood in the eye.

corneal edema means swelling of the cornea, the clear front “window” of the eye. It happens when extra fluid builds up inside the corneal tissue. This swelling can make vision look blurry, hazy, or “foggy,” and may cause glare. The term is commonly used in eye exams, emergency eye evaluations, and post-surgical follow-up.

corneal haze is a loss of normal corneal clarity that makes the cornea look slightly cloudy. It is a clinical finding rather than a single disease, and it can range from subtle to obvious. It is commonly discussed after eye injuries, infections, inflammation, and refractive surgery. Clinicians use the term to describe what they see on exam and how it may affect vision.

An afferent pupillary defect is a clinical sign found during an eye exam. It means one eye sends a weaker “light signal” to the brain than the other eye. It is commonly checked with a light test called the swinging flashlight test. Clinicians use it to help evaluate optic nerve and retinal health.

relative afferent pupillary defect is an exam finding that suggests one eye is sending a weaker light signal to the brain than the other eye. It is detected by comparing how the pupils respond when light is moved between the two eyes. It is commonly used in eye clinics and emergency settings as a quick screen for optic nerve or severe retinal problems. It is also taught early in ophthalmology and optometry because it helps localize disease to the “input” (afferent) visual pathway.

RAPD stands for **relative afferent pupillary defect**. It is a **pupil response finding** that can suggest reduced input from one eye to the brain. RAPD is most commonly checked during a routine eye exam using a **light-shining test**. Clinicians use it to help evaluate the **optic nerve and retina**.

mydriasis means dilation (widening) of the pupil, the black opening in the center of the eye. It can happen naturally in dim light or from emotions, medications, or certain eye and nerve conditions. In eye care, mydriasis is commonly created on purpose using eyedrops to improve the view inside the eye. It is also discussed clinically as a sign that can help localize neurologic or ocular problems.

miosis is the medical term for a pupil that is smaller than expected. It can be a normal response to bright light or near focusing. It can also be a clinical sign of medication effects or certain eye or neurologic conditions. Clinicians also intentionally create miosis during some eye treatments and surgeries.

anisocoria means the two pupils are different sizes. The pupils are the black centers of the eyes that change size with light and focus. anisocoria is a clinical finding, not a disease by itself. It is commonly discussed in eye exams, emergency evaluation, and neurologic assessment.

enophthalmos means the eye sits farther back in the eye socket than usual. It is a clinical finding that can affect appearance and sometimes eye function. Clinicians use the term when describing orbital (eye socket) disease, injury, or tissue loss. It is commonly discussed in ophthalmology, optometry, ENT, and facial trauma care.

proptosis means the eye appears pushed forward from the orbit (the bony eye socket). It is a clinical sign, not a diagnosis, and it can be mild or pronounced. Clinicians use the term in eye care, emergency care, endocrinology, and radiology. It is commonly discussed when evaluating “bulging eyes” or orbital disease.

chemosis is swelling (edema) of the conjunctiva, the thin clear tissue covering the white of the eye and lining the eyelids. It often looks like “puffiness” or a blister-like, gel-like elevation around the colored part of the eye. The term is commonly used in eye exams to describe a visible finding rather than a single disease. Clinicians use it to help narrow down causes of red, irritated, watery, or swollen eyes.

lid swelling means the eyelid looks puffy, enlarged, or thicker than usual. It is a common sign that can come from local eyelid problems or broader eye and health conditions. Clinicians use the term in eye exams to describe what they see and to guide the next steps in evaluation. Patients often use it to describe “a swollen eyelid,” “puffy eyes,” or “an eyelid bump.”

ptosis is the medical term for a drooping upper eyelid. It can affect one eye or both eyes and may be mild or severe. ptosis is commonly discussed in eye clinics, emergency settings, and neurology because it can be cosmetic, vision-related, or a sign of an underlying condition. The term is used in diagnosis, documentation, and treatment planning.

blepharospasm is involuntary, repetitive tightening of the muscles that close the eyelids. It can cause excessive blinking or episodes where the eyelids clamp shut. Clinicians most often discuss blepharospasm in eye care and neurology because it can interfere with functional vision. The term is used to describe a symptom pattern and a diagnosis, depending on the underlying cause.

watery discharge is a clear, thin fluid that comes from the eye or collects at the eyelid margin. People often describe it as “watery eyes,” “tearing,” or “runny eyes.” In eye care, the term is used to document a symptom and to narrow down possible causes. It is commonly discussed in dry eye, allergy, infection, and tear-drainage problems.

mucopurulent discharge is an eye discharge that contains both mucus and pus-like material. It often looks thick, cloudy, yellowish or yellow-green, and can cause crusting on the lashes. Clinicians use the term to describe a pattern of eye surface inflammation, often involving infection. You may hear it mentioned in visits for “pink eye,” eyelid irritation, or tear duct problems.

discharge is fluid or debris that comes from the eye or collects along the eyelids and lashes. People may describe it as “watering,” “mucus,” “crust,” or “pus.” In eye care, discharge is treated as a symptom and a clinical sign that helps narrow down a cause. It is commonly discussed in conditions affecting the conjunctiva, eyelids, tear film, and cornea.