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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause
The Partita for keyboard No. 2 in C minor, BWV 826, is a suite of six movements written for the harpsichord by Johann Sebastian Bach. It was announced in 1727, [ 1 ] issued individually, and then published as Bach's Clavier-Übung I in 1731.
Johannes Brahms ' String Quartet No. 1 in C minor and String Quartet No. 2 in A minor were completed in Tutzing, Bavaria, during the summer of 1873, and published together that autumn as Op. 51. They are dedicated to his friend Theodor Billroth. He only published one other string quartet, No. 3 in B-flat Major, in 1876.
Maddox wing. The Maddox Wing is an instrument utilized by ophthalmologists, orthoptists and optometrists in the measurement of strabismus (misalignment of the eyes; commonly referred to as a squint or lazy eye by the lay person). It is a quantitative and subjective method of measuring the size of a strabismic deviation by dissociation of the ...
Esotropia (from Greek eso 'inward' and trope 'a turning' [1]) is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [2] It is the opposite of exotropia and usually involves more severe axis deviation than ...
The Piano Trio No. 2 in C minor, Op. 66, was written by Felix Mendelssohn in 1845 and published in February 1846. [1] The work is scored for a standard piano trio consisting of violin, cello and piano. Mendelssohn dedicated the work to his close friend and violinist, Louis Spohr, who played through the piece with the composer at least once.
The three String Trios, Op. 9 were composed by Ludwig van Beethoven in 1797–98. He published them in Vienna in 1799, with a dedication to his patron Count Johann Georg von Browne (1767–1827). [1] They were first performed by the violinist Ignaz Schuppanzigh with two colleagues from his string quartet. According to the violinist and ...