V-pattern is a type of “pattern strabismus,” meaning an eye misalignment that changes with upgaze and downgaze. It describes a situation where the horizontal eye deviation differs between looking up and looking down. V-pattern is most commonly discussed in strabismus (eye alignment) exams and strabismus surgery planning. Clinicians use it as a descriptive label to help explain *how* and *when* the eyes drift.
A-pattern is a type of **pattern strabismus**, meaning the eye misalignment changes depending on where you look. It describes a horizontal eye deviation that is **larger in upgaze** and **smaller in downgaze**, forming an “A” shape when measured. A-pattern is most commonly discussed in **strabismus (eye alignment) exams** and **strabismus surgery planning**. It can occur with either **esotropia** (eyes turn in) or **exotropia** (eyes turn out).
dissociated vertical deviation (DVD) is an eye alignment condition where one eye drifts upward when the eyes are not working together as a team. It is most noticeable when one eye is covered or when a person is tired or not focusing well. DVD is commonly discussed in pediatric ophthalmology and strabismus (eye misalignment) clinics. Clinicians use the term to describe a specific pattern of vertical drifting that differs from many other causes of hypertropia (an eye that sits higher).
convergence insufficiency is a binocular vision disorder where the eyes have difficulty turning inward together for near tasks. In plain terms, the eyes may not “team” well when reading or doing close-up work. It is commonly discussed in optometry and ophthalmology when people report eyestrain, headaches, or intermittent double vision at near. It is evaluated with office-based eye alignment and focusing tests.
congenital esotropia is an eye alignment condition where one or both eyes turn inward from very early in life. It is most often discussed in pediatric ophthalmology and optometry because it affects visual development. Clinicians use the term when describing early-onset inward misalignment and planning a strabismus workup. Patients and families commonly encounter it during evaluations for “crossed eyes” in a baby or young child.
infantile esotropia is an early-onset type of strabismus where one or both eyes turn inward. It typically begins in infancy, often within the first months of life. In plain terms, the eyes are not aligned, so they do not point at the same target together. It is commonly used as a clinical diagnosis in pediatric ophthalmology and optometry.
intermittent exotropia is a type of strabismus where one eye sometimes drifts outward. The outward drift is intermittent, meaning it comes and goes rather than being constant. It is commonly discussed in eye clinics when evaluating eye alignment, binocular vision, and depth perception. It is also a frequent topic in optometry and ophthalmology training because management can range from monitoring to surgery.
accommodative esotropia is an inward turning of one eye (esotropia) that is linked to focusing effort (accommodation). It most often appears in early childhood and is commonly associated with farsightedness (hyperopia). It is discussed in eye exams, glasses prescriptions, and strabismus (eye alignment) evaluations.
hypotropia is a type of eye misalignment where one eye sits lower than the other. It is a form of vertical strabismus (vertical “eye turn”). It may be constant or come and go depending on fatigue, gaze direction, or focus. The term is commonly used in eye exams, strabismus clinics, and neuro-ophthalmology.
hypertropia is a type of eye misalignment where one eye is positioned higher than the other. It is a form of strabismus, meaning the eyes are not pointing at the same place at the same time. Clinicians use the term in eye exams to describe and measure vertical alignment problems. Patients may notice it as double vision, eye strain, or a head tilt, depending on the cause.
exotropia is a type of strabismus (eye misalignment) where one eye turns outward, away from the nose. It can be constant or come and go, especially when a person is tired or daydreaming. The term is commonly used in eye clinics and vision screening to describe outward drifting of an eye. It is discussed in both pediatric and adult ophthalmology and optometry because it can affect binocular vision and comfort.
esotropia is a type of eye misalignment where one eye turns inward toward the nose. It is a form of strabismus (misaligned eyes) that can be constant or intermittent. The term is used in eye clinics to describe alignment findings and guide evaluation. It is also used in research and medical records to classify patterns of strabismus.
strabismus is a condition where the eyes are not aligned and do not point in the same direction. One eye may look straight ahead while the other turns in, out, up, or down. It is commonly discussed in pediatric eye care, adult eye clinics, and neuro-ophthalmology. The term is used to describe both the visible eye turn and the underlying binocular vision problem.
atropine penalization is a treatment approach that uses atropine eye drops to temporarily blur vision in the stronger (better-seeing) eye. The goal is to encourage the brain to use the weaker eye more often. It is most commonly used in children with amblyopia (often called “lazy eye”). It is considered a form of “penalization,” meaning the better eye is intentionally disadvantaged in a controlled way.
patching is the use of an eye patch or occlusive covering to block vision in one eye or to protect the eye. It is commonly used in pediatric eye care for amblyopia (“lazy eye”) and in general ophthalmology for temporary comfort or protection. Depending on the goal, a patch may be opaque, translucent, or protective rather than vision-blocking. The exact approach varies by clinician and case.
occlusion therapy is a method of intentionally blocking vision in one eye for a planned period of time. It is most commonly used to help treat amblyopia (“lazy eye”) by encouraging the brain to use the weaker eye. It can also be used to manage symptoms like double vision by preventing two competing images from reaching the brain. It is used in pediatric ophthalmology, optometry, orthoptics, and sometimes in adult eye care.
deprivation amblyopia is a type of “lazy eye” caused by reduced visual input to the brain during early visual development. It happens when something blocks or severely blurs the image reaching the retina, such as a cataract or a droopy eyelid. The term is used in ophthalmology and optometry to describe a specific mechanism of reduced vision in infants and children. It helps clinicians distinguish this condition from other amblyopia types that have different causes and management priorities.
strabismic amblyopia is reduced vision in one (or sometimes both) eye(s) caused by eye misalignment (strabismus) during visual development. In simple terms, the brain “learns” to rely on one eye and to ignore the other to avoid double vision. It is most commonly identified in infants and children, but it can be recognized later in life as a longstanding condition. The term is used in eye clinics to describe a specific type of amblyopia that is linked to strabismus, not primarily to glasses power differences or eye disease.
anisometropic amblyopia is reduced vision in one eye because each eye has a different refractive error during early visual development. In plain terms, one eye forms a clearer image than the other, and the brain learns to rely on the clearer eye. It is a common diagnosis in pediatric eye care and is also discussed in optometry and ophthalmology training. It is typically identified during vision screening or a comprehensive eye exam.
lazy eye is a common name for **amblyopia**, a condition where vision does not develop normally in one eye (sometimes both). It usually starts in early childhood while the brain and visual pathways are still maturing. The eye often looks normal, but the **brain favors one eye** and relies on it more for seeing. The term is widely used by patients, families, optometrists, and ophthalmologists in everyday clinical conversations.