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  2. Argus retinal prosthesis - Wikipedia

    en.wikipedia.org/wiki/Argus_retinal_prosthesis

    The Argus II was initially available at a limited number of clinics in France, Germany, Italy, the Netherlands, the United Kingdom and Saudi Arabia, at an EU market price of US$115,000. [13] When the Argus II launched in the United States in February 2013, Second Sight announced that it would be priced at around $150,000, excluding the cost of ...

  3. Tritium radioluminescence - Wikipedia

    en.wikipedia.org/wiki/Tritium_radioluminescence

    Tritium is used to illuminate the iron sights of some small arms. The reticle on the SA80's optical SUSAT sight as well as the LPS 4x6° TIP2 telescopic sight of a PSL rifle, contains a small amount of tritium for the same effect as an example of

  4. Trijicon - Wikipedia

    en.wikipedia.org/wiki/Trijicon

    Trijicon specializes in self-luminous optics and night sights, mainly using the low-energy tritium illumination, light-gathering fiber optics and battery-powered LED. [ 1 ] [ 2 ] [ 3 ] Additionally, Trijicon is a contractor for the United States military and supplies the Advanced Combat Optical Gunsight (ACOG) and RX01 reflex sights .

  5. Stadiametric rangefinding - Wikipedia

    en.wikipedia.org/wiki/Stadiametric_rangefinding

    Mil-dot reticle as used in telescopic sights. • If the helmeted head of a man (≈ 0.25 m tall) fits between the fourth bar and the horizontal line, the man is at approximately 100 meters distance. • When the upper part of the body of a man (≈ 1 m tall) fits under the first line, he stands at approximately 400 meters distance.

  6. Aimpoint CompM4 - Wikipedia

    en.wikipedia.org/wiki/Aimpoint_CompM4

    The U.S. Army's newest version of the M68 Close Combat Optic (CCO) is the Aimpoint CompM4. The shooter's end of the CompM4 with the power control knob An M4 carbine with a Picatinny rail system on the upper receiver and four-sided handguard, showing a GPS-02 "Grip Pod", a type of vertical grip that has a deployable bipod inside the handle and an M68 CCO optical sight C7NLD assault rifle with ...

  7. Reflector sight - Wikipedia

    en.wikipedia.org/wiki/Reflector_sight

    A reflector sight or reflex sight is an optical sight that allows the user to look through a partially reflecting glass element and see an illuminated projection of an aiming point or some other image superimposed on the field of view.

  8. Clean Development Mechanism - Wikipedia

    en.wikipedia.org/wiki/Clean_Development_Mechanism

    In July 2012, the market price for CERs fell to new record low of €2.67 a tonne, a drop in price of about 70% in a year. Analysts attributed the low CER price to lower prices for European Union emissions allowances, oversupply of EU emissions allowances and the slowing European economy.

  9. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders .