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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 ...
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]
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
Top center: Indira Gandhi was the first and only woman to serve as prime minister. Top right: Morarji Desai was the first non- Congress prime minister. Bottom left: Atal Bihari Vajpayee was the first non-Congress prime minister to complete a full 5 year term. Bottom center: Manmohan Singh was the first prime minister from a minority religion.
Convergence insufficiency. Convergence Insufficiency. Other names. Convergence disorder. Specialty. Ophthalmology, optometry. Convergence insufficiency is a sensory and neuromuscular anomaly of the binocular vision system, characterized by a reduced ability of the eyes to turn towards each other, or sustain convergence .
Patka. (Model- 1) (Model- 2) (Model- 3) Combat helmet. N/A. India. Status: In service (to be phased out), used extensively by several branches of the Indian Army. Variants mentioned provide different areas of protection to the head and are composed of steel and kevlar. [10]
Prithvi (missile) Prithvi-I (SS-150) surface-to-surface tactical ballistic missile. Strap-down inertial navigation system. 150 km (93 mi) High explosives, penetration, cluster munition, fragmentation, thermobaric, chemical weapon and tactical nuclear weapon. 1994.
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.