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Horror fusionis is a rare condition and normally appears only in patients who have been treated by means of surgery or other interventions. [2] Attempts to achieve stereoscopic vision, in particular anti-suppression therapy and other orthoptic exercises, may lead to double vision as undesired side effect, in particular also to horror fusionis.
Diplopia, also known as double vision, is the simultaneous perception of two images of a single object. It can be binocular or monocular, voluntary or involuntary, and have various ophthalmologic, neurological, or systemic causes.
Learn about the present perfect, a grammatical combination of the present tense and perfect aspect that expresses past events with present consequences. Compare the usage and forms of the present perfect in English and other languages, such as German, French and Italian.
Duane syndrome is a rare congenital eye disorder that affects the ability to move the eye outward. It is also known as Duane's retraction syndrome, eye retraction syndrome or Stilling-Türk-Duane syndrome. Learn about its genetic causes, classification, diagnosis and surgical options.
Learn how French verbs vary in endings depending on person, tense and mood. Find out the three conjugations, the seven moods and tenses, and the two auxiliary verbs avoir and être.
Learn about the basic and advanced aspects of French grammar, such as verbs, nouns, gender, agreement, mood, tense and more. See how French grammar differs from and resembles other Romance languages.
Conjugation is the creation of derived forms of a verb from its principal parts by inflection. Learn about the features, types, and examples of conjugation in different languages, as well as verbal agreement and nonverbal person agreement.
In contrast, fixation disparity is a very small deviation of the pointing directions of the eyes that is present while performing binocular fusion. Heterophoria is usually asymptomatic. This is when it is said to be "compensated". When fusional reserve is used to compensate for heterophoria, it is known as compensating vergence.