allergies are immune reactions to usually harmless substances such as pollen, dust mites, or animal dander. In eye care, allergies commonly refer to allergic conditions that affect the eyelids, conjunctiva, and tear film. They are frequently discussed in clinics because they can mimic dry eye and other causes of redness or irritation. allergies can also describe medication, contact lens, or environmental triggers that worsen ocular symptoms.

A medication list is a current record of everything a person takes to treat or prevent health conditions. It commonly includes prescription drugs, over-the-counter products, vitamins, and herbal supplements. In eye care, it also includes eye drops, ointments, injections, and contact-lens solutions used like medications. Clinics and hospitals use it during check-in, before procedures, and when treatment plans change.

medical history is a structured record of a person’s past and current health information. It includes medical conditions, surgeries, medications, allergies, and relevant lifestyle factors. In eye care, it is used during eye exams, urgent visits, and before procedures to support safe decisions. It is commonly documented in a clinic intake form and confirmed through a clinician interview.

ocular history is a structured record of a person’s past and current eye-related health information. It includes symptoms, diagnoses, surgeries, injuries, medications, and vision correction details. It is commonly collected in optometry and ophthalmology visits, emergency care, and pre-surgical assessments. It helps clinicians understand eye risks and interpret exam findings in context.

review of systems (ROS) is a structured set of questions about symptoms across body systems. It helps clinicians document what you feel now, not just what has been diagnosed in the past. It is commonly used during eye exams, medical visits, emergency care, and pre-surgical evaluations. In eye care, it helps connect general health symptoms to possible eye-related causes or risks.

history of present illness (HPI) is the structured story of a patient’s current symptoms and concerns. It explains what is happening now, when it started, and how it has changed over time. It is commonly used in medical notes in clinics, emergency departments, and hospitals, including eye care visits.

angle recession is a tear within the eye’s drainage angle that can occur after blunt eye injury. It is identified during an eye exam, most often with a test called gonioscopy. In plain terms, it means the eye’s internal “drain” area has been mechanically damaged. It matters because it can increase the long-term risk of glaucoma in some people.

peripheral anterior synechiae are abnormal adhesions between the outer edge of the iris and the eye’s drainage angle. In plain terms, the iris tissue “sticks” to structures where fluid normally exits the eye. This finding is most commonly discussed in glaucoma care and in the evaluation of narrow or closed angles. Clinicians use it as a descriptive diagnosis that helps explain risk to eye pressure and optic nerve health.

posterior synechiae are adhesions where the iris sticks to the front surface of the lens. They most often form after inflammation inside the eye, especially anterior uveitis. They are commonly discussed during slit-lamp exams, pupil dilation, and surgical planning. They can affect pupil shape, fluid flow, and sometimes eye pressure.

synechiae are abnormal “sticking” attachments between eye tissues. In ophthalmology, the term most often describes iris adhesions to the lens or cornea. synechiae commonly occur after inflammation (uveitis), trauma, or surgery. Clinicians use the presence and pattern of synechiae to help explain symptoms and guide management.

band keratopathy is a corneal condition where calcium deposits form a gray-white “band” across the front surface of the eye. It most often appears in the part of the cornea exposed between the eyelids. People may notice glare, blurred vision, or a rough, irritated eye surface. The term is commonly used in eye clinics to describe this specific pattern of corneal calcification.

exposure in eye care describes contact between the eye (or eye tissues) and an external factor such as light, air, chemicals, microbes, or medications. It can also refer to controlled light exposure used in eye imaging and examination. Clinicians use the term when discussing risks, documenting patient history, or describing exam and surgical conditions. The meaning depends on context, so it is usually paired with a specific source (for example, UV exposure, chemical exposure, or exposure keratopathy).

lagophthalmos is the inability to fully close the eyelids. It can be partial or complete, and it may happen during blinking or sleep. Clinicians use the term in eye exams and neurology-related facial assessments. It matters because incomplete closure can expose and dry the front surface of the eye.

lid lag is when the upper eyelid does not follow the eye smoothly during downward gaze. It is a clinical sign seen during an eye or eyelid exam. It is commonly discussed in thyroid eye disease, eyelid retraction, and some neurologic conditions. Clinicians also use the term when documenting eyelid movement after surgery or injury.

Seidel sign is a clinical finding used to detect a leak of clear fluid from the eye. It is most commonly checked with fluorescein dye during a slit-lamp eye exam. A positive Seidel sign suggests that aqueous humor (the eye’s internal fluid) is escaping through a wound. It is frequently discussed in eye trauma and post-surgical wound evaluation.

corneal staining is a clinical finding where a dye highlights areas of the cornea that are damaged, irregular, or unprotected. It is most commonly seen during an eye exam under a slit-lamp microscope. Clinicians use it to make otherwise subtle surface problems easier to see and document. It is widely used in optometry and ophthalmology for evaluating dry eye, injuries, infections, and contact lens-related issues.

rubeosis iridis means abnormal new blood vessel growth on the iris, the colored part of the eye. It is most often discussed as an exam finding that signals reduced oxygen (ischemia) inside the eye. Clinicians use the term in eye clinics and emergency settings because it can precede serious pressure problems. It is commonly linked to retinal diseases that drive new vessel formation.

drusen are small deposits of extracellular material that can be seen in and around the retina. They are most commonly discussed as a clinical finding related to age-related macular degeneration (AMD). The term is also used for optic nerve head drusen, which are deposits at the optic disc. In everyday practice, drusen are “something the eye doctor sees” during imaging and examination, not a treatment you “get.”

hard exudates are yellow-white retinal deposits made from leaked blood lipids and proteins. They are a clinical sign seen during eye exams and retinal imaging. They commonly appear in conditions that cause retinal blood vessel leakage, such as diabetic eye disease. Clinicians use them to help describe disease activity, location, and potential risk to central vision.

cotton wool spots are small, pale, fluffy-looking patches seen on the retina during an eye exam. They represent a sign of injury in the retinal nerve fiber layer (the layer carrying visual signals to the brain). They are commonly discussed in diabetic and hypertensive eye disease, but can appear in other conditions. Clinicians use them as a clue that the retina (and sometimes the body) may be under vascular stress.