entropion is a condition where the eyelid turns inward toward the eye. It most often affects the lower eyelid, but it can occur in the upper eyelid as well. When the lid turns in, eyelashes and skin can rub the eye’s surface. The term is commonly used in eye clinics to describe a specific eyelid malposition that may irritate the cornea and conjunctiva.

Mueller muscle resection is an eyelid surgery used to lift a droopy upper eyelid (ptosis). It works by shortening tissues on the inside of the upper eyelid, including Müller’s muscle. It is most commonly used for mild to moderate ptosis in selected patients. It is performed by ophthalmologists, often those specializing in oculoplastics.

levator advancement is a surgical technique used to lift a drooping upper eyelid (ptosis). It works by tightening or repositioning the eyelid’s main lifting structure, the levator muscle tendon (levator aponeurosis). It is commonly performed by ophthalmologists (often oculoplastic surgeons) in functional and cosmetic eyelid surgery settings. It may be done alone or combined with other eyelid procedures when appropriate.

ptosis surgery is an operation to lift a drooping upper eyelid (ptosis). It is commonly performed by ophthalmologists, often in oculoplastics (eyelid and orbit surgery). It may be done to improve the visual field, eyelid function, or eyelid position symmetry. The approach depends on the cause of ptosis and which eyelid-lifting structures are weak.

blepharoplasty is surgery on the eyelids to remove, reposition, or reshape eyelid tissues. It is commonly performed on the upper eyelids, lower eyelids, or both. The goal may be functional (helping the eyelids work better) or cosmetic (changing appearance). It is used in ophthalmology and oculoplastic surgery, and also in facial plastic surgery settings.

botulinum toxin for strabismus is an injectable medication used to temporarily weaken specific eye muscles. It is used to help realign the eyes when the eyes point in different directions (strabismus). It is most commonly used in ophthalmology and sometimes in neuro-ophthalmology settings. It may be used as an alternative or supplement to eye muscle surgery in selected cases.

adjustable sutures are surgical stitches that can be tightened or loosened after they are placed. They are used to fine-tune tissue position when exact alignment is hard to predict during surgery. In eye care, they are most commonly used in strabismus (eye muscle) surgery. They may also be used in selected eyelid or other ophthalmic procedures, depending on clinician preference.

resection is a surgical term that means removing a piece of tissue. In eye care, it can be used to treat a condition, to repair anatomy, or to obtain a sample for diagnosis. It is commonly used in ophthalmology and oculoplastic surgery, and in some cases during strabismus (eye alignment) surgery. The exact meaning depends on *what* tissue is being removed and *why*.

recession is a clinical term that means moving a structure backward or farther from its original position. In eye care, recession most commonly refers to surgically moving an eye muscle to reduce its pull. It can also describe a diagnostic finding, such as angle recession after blunt eye trauma. Clinicians use the word recession in both surgical planning and exam documentation.

strabismus surgery is an eye muscle operation used to improve eye alignment. It is performed by an ophthalmologist (eye surgeon), often with input from orthoptists or optometrists. It is commonly used for “crossed eyes,” “wandering eyes,” and some types of double vision. The goal is to change how the eye muscles pull so the eyes point more consistently in the same direction.

epicanthal folds are skin folds at the inner corner of the eyelids (the medial canthus). They can partly cover the inner corner where the upper and lower eyelids meet. They are a common normal anatomic feature and can also appear with certain conditions. The term is used in eye exams, facial assessment, and eyelid surgery planning.

pseudostrabismus is the appearance of crossed or misaligned eyes when the eyes are actually properly aligned. It is most commonly noticed in infants and young children, especially in photos or certain gaze positions. The term is used in eye care to describe a “false strabismus” and to distinguish it from true eye misalignment. It is a descriptive diagnosis made after an eye alignment exam.

pediatric nasolacrimal duct obstruction is a tear-drainage blockage that happens in infants and children. It commonly causes watery eyes and mucus-like discharge because tears do not drain normally into the nose. It is discussed in pediatric eye care, optometry, and ophthalmology when a child has persistent tearing. It can be congenital (present from birth) or acquired (developing later).

prematurity screening is an eye-health evaluation used for babies born early. It is most commonly used in neonatal intensive care units (NICUs) and pediatric eye clinics. Its main goal is to detect eye conditions linked to premature birth, especially retinopathy of prematurity (ROP). The screening typically involves examining the retina, the light-sensing tissue at the back of the eye.

retinopathy of prematurity (ROP) is a retinal disease that can occur in premature infants. It involves abnormal development of blood vessels in the retina, the light-sensing tissue at the back of the eye. It is most commonly discussed in neonatal intensive care units (NICUs) and pediatric eye clinics. It is used as a diagnosis and staging system to guide screening, monitoring, and (when needed) treatment.

latent nystagmus is an involuntary, rhythmic eye movement that appears or becomes more obvious when one eye is covered. It is most often discussed in pediatric eye care and strabismus (eye misalignment) clinics. Many clinicians consider it part of a broader pattern related to early binocular vision development. It is commonly identified during exams that temporarily block vision in one eye.

congenital nystagmus is a condition where the eyes make involuntary, repetitive movements from early life. These movements can be side-to-side, up-and-down, or sometimes circular. It is commonly discussed in pediatric eye care, optometry, and ophthalmology clinics. The term is often used when describing long-standing nystagmus that begins in infancy rather than later in adulthood.

nystagmus is an involuntary, rhythmic movement of the eyes. It can make vision appear shaky or blurred and may affect balance or comfort. nystagmus is a clinical term used in eye care and neurology to describe a sign seen during an exam. It is discussed in settings ranging from routine eye checks to emergency evaluation of dizziness or new vision changes.

superior oblique palsy is a problem with one of the eye’s vertical-rotational muscles or its nerve supply. It most often refers to weakness of the superior oblique muscle due to a fourth cranial (trochlear) nerve palsy. It commonly causes vertical double vision and a head tilt that helps a person see more clearly. The term is used in ophthalmology, optometry, neurology, and strabismus (eye misalignment) clinics.

inferior oblique overaction is a pattern of eye movement in which one eye elevates more than expected when it turns inward. It is commonly described in strabismus (eye misalignment) evaluations. Clinicians use the term to document a finding on exam and to help explain certain “upshoot” eye movements. It can be associated with symptoms like eye misalignment in specific gaze positions, head posture changes, or reduced binocular coordination.