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.
burning is a symptom describing a hot, stinging, or irritated sensation in or around the eye. It is commonly reported with dry eye disease, allergies, eyelid inflammation, and irritation from contact lenses or screen use. Clinicians also use the word to describe chemical or thermal injuries to the ocular surface. Because it is subjective and non-specific, burning is interpreted alongside exam findings and other symptoms.
itching is an unpleasant sensation that creates the urge to rub or scratch. In eye care, itching most often refers to irritation of the eyelids, conjunctiva (the clear tissue over the white of the eye), or the ocular surface. It is commonly discussed in the context of allergies, dry eye, eyelid inflammation, and contact lens discomfort. Clinicians use itching as a symptom that helps describe what the eye feels like and what conditions may be contributing.
grittiness is a common eye symptom described as feeling like sand, dust, or a foreign body is in the eye. It is most often used to describe irritation on the surface of the eye and eyelids. Patients commonly use the term in dry eye, eyelid inflammation, and contact lens discomfort. Clinicians use it as a clue to guide eye-surface evaluation and testing.
foreign body sensation is the feeling that something is in the eye when nothing obvious is present. People often describe it as “gritty,” “scratchy,” “sandy,” or like an eyelash is stuck. It is commonly used in eye care visits as a symptom that helps narrow possible causes. It can come from the ocular surface (tear film, cornea, conjunctiva) or from eyelid/lash issues.
dryness is a common term for a feeling of insufficient moisture on the eye surface. In eye care, it often describes symptoms linked to tear film instability or reduced tear production. People may notice burning, grittiness, fluctuating vision, or contact lens discomfort. Clinicians use the term dryness as a symptom description and as a cue to evaluate the ocular surface.
epiphora means overflow of tears onto the face, often described as “watery eyes.” It is a clinical term used in eye clinics, optometry, and ophthalmology notes. It can be a symptom of tear overproduction, poor tear drainage, or both.
tearing is the production and presence of tears on the eye surface. It can be a normal protective function or a symptom when it feels excessive. In clinics, tearing is discussed in dry eye, allergies, eyelid problems, and tear-duct conditions. People may describe it as “watery eyes,” “overflowing tears,” or “epiphora.”