• Tunnel Vision Lyrics

Mar 20, 2017 Tunnel Vision Hidden Brain When you really need something — whether it's money, food, or even time — it can be hard to focus on anything else. Researchers call this scarcity, and say it can affect many aspects of our lives. Nov 17, 2017  9 Serious Eye Symptoms to Watch Out For. Flashing lights, floaters, and eye pain — these are just a few of the warning signs that should prompt you to see your eye doctor.

Tunnel vision is the loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision.^[1]

Causes[edit]

Tunnel vision can be caused by:

• Glaucoma, a disease of the eye.^[2]
• Retinitis pigmentosa, a disease of the eye.^[3]
• Blood loss (hypovolemia)
• Alcohol consumption.^[4] In addition, the vision becomes blurred or double since eye muscles lose their precision causing them to be unable to focus on the same object.
• Sustained (1 second or more) high accelerations.^[5] Typically, flying an airplane with a centripetal acceleration of up to or over 39 m/s² (4gs) with the head towards the center of curvature, common in aerobatic or fighter pilots. In these cases, tunnel vision and greyout may proceed to a g-force induced Loss Of Consciousness (g-LOC).
• Hallucinogenic drugs, in particular the dissociatives.
• Stimulant drugs that release and/or prevent the reuptake of dopamine and norepinephrine, in particular amphetamines.</ref>{{cite

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• Extreme fear or distress, most often in the context of a panic attack.
• Excitement or extreme pleasure such as on a roller-coaster, causing a surge of adrenaline in the body.
• During periods of high adrenaline production, such as an intense physical fight.
• Altitude sickness, hypoxia in passenger aircraft^[6]
• Exposure to oxygen at a partial pressure above 1.5-2 atmospheres, producing central nervous system oxygen toxicity, called narcosis.^[7] Other symptoms can include dizziness, nausea, blindness, fatigue, anxiety, confusion and lack of coordination.
• Pituitary tumours (or other brain tumours that compress the optic chiasm)
• Prolonged exposure to air contaminated with heated hydraulic fluids and oils, as can sometimes happen in passenger aircraft.^[6]
• Severe cataracts, causing a removal of most of the field of vision
• During the aura phase of a migraine
• Intense anger, due to the body being rapidly flooded with adrenaline and oxygen
• A bite from a black mamba and other snakes with the same strength venom.
• Mercury poisoning (especially methylmercury)

Eyeglass users[edit]

Eyeglass users experience tunnel vision to varying degrees due to the corrective lens only providing a small area of proper focus, with the rest of the field of view beyond the lenses being unfocused and blurry. Where a naturally sighted person only needs to move their eyes to see an object far to the side or far down, the eyeglass wearer may need to move their whole head to point the eyeglasses towards the target object.^{[citation needed]}

The eyeglass frame also blocks the view of the world with a thin opaque boundary separating the lens area from the rest of the field of view. The eyeglass frame is capable of obscuring small objects and details in the peripheral field.^{[citation needed]}

Mask, goggle, and helmet users[edit]

Tunnel Vision Lyrics

Activities which require a protective mask, safety goggles, or fully enclosing protective helmet can also result in an experience approximating tunnel vision. Underwater diving masks using a single flat transparent lens usually have the lens surface several centimeters from the eyes. The lens is typically enclosed with an opaque black rubber sealing shell to keep out water. For this type of mask the peripheral field of the diver is extremely limited. Generally, the peripheral field of a diving mask is improved if the lenses are as close to the eye as possible, or if the lenses are large, multi-window, or is a curved wrap-around design.^{[citation needed]}

Protective helmets such as a welding helmet restrict vision to an extremely small slot or hole, with no peripheral perception at all. This is done out of necessity so that ultraviolet radiation emitted from the welding arc does not damage the welder's eyes due to reflections off shiny objects in the peripheral field.^{[citation needed]}

Optical instruments[edit]

Binoculars, telescopes, and microscopes induce an experience of extreme tunnel vision due to the design of the optical components. A wide field microscope or telescope generally requires much larger diameter and thicker lenses, or complex parabolic mirror assemblies, either of which results in significantly greater cost for construction of the optical device.^{[citation needed]}

Wide-field binoculars are possible, but require bulkier, heavier, and more complex eyepieces. The diameter of the objective lenses is unimportant for field of view.^[8] The widest-angle eyepieces used in telescopes are so large that two would not fit side-by-side for use in binoculars.^{[citation needed]}

I'm fairly new to DnD so I apologize for the noob question. I recently found a game store running the Adventures League for 5e. Last night was our first adventure, had a ton of fun but I was hoping someone could help me with a couple questions in regards to the Attack roll and Damage modifiers. Special modifiers on the weapon itself. Some magic weapons confer bonuses to the Attack Roll, Damage Roll, or Both. A +1 Weapon DMG, 213, for example, confers a +1 bonus to both rolls. Buffs/Other Effects. The spell Bless PHB, 219, for example, adds a d4 roll to any attack roll the target makes. Dmg modifiers on greatsword attak 5e. Six abilities provide a quick description of every creature’s physical and mental characteristics: Strength, measuring physical power Dexterity, measuring agility Constitution, measuring endurance Intelligence, measuring reasoning and memory Wisdom, measuring perception and insight Charisma, measuring force of personality Is a character muscle-bound and insightful?

See also[edit]

References[edit]

1. ^'Definition of Tunnel vision'. MedicineNet.
2. ^'Glaucoma: MedlinePlus Medical Encyclopedia'. www.nlm.nih.gov. Retrieved 2016-02-21.
3. ^'Retinitis pigmentosa'. Genetics Home Reference. 2016-02-15. Retrieved 2016-02-21.
4. ^Effects of Alcohol on VisionArchived 2006-10-08 at the Wayback Machine
5. ^'Virtual Naval Hospital: United States Naval Flight Surgeon Manual: Third Edition 1991: Chapter 2: Acceleration and Vibration: Sustained Acceleration'. web.archive.org. 23 November 2005.
6. ^ ^ab'Friend Statement'. web.archive.org. 5 October 2006.
7. ^'Virtual Naval Hospital: United States Naval Flight Surgeon Manual: Third Edition 1991: Chapter 1: Oxygen Toxicity'. web.archive.org. 22 November 2005.
8. ^'Meade Sports Optics - How to Select the Right Binocular'. www.meade.com.

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