Visual perceptual narrowing, Tunnel vision, or "Kalnienk Vision", is a visual defect of the peripheral vision. Persons who suffer from tunnel vision pay complete attention towards their central vision while being (sometimes entirely) unaware of information coming from their peripheral vision.
Tunnel Vision Related Conditions
Tunnel vision is often connected with neurological, biochemical, hormonal and behavioral issues in individuals and is also related to chronic stress.
Temporary and permanent tunnel vision
- Worst case of tunnel vision results in the permanent loss of peripheral vision
- Temporary condition of tunnel vision disappears on losing centric concentration
- For sports, military or police personnel temporary tunnel vision carries certain advantages and is not always harmful
What Causes Tunnel Vision?
Tunnel vision has many causes. Some are the following:
- Optic nerve damage
- Eye diseases such as glaucoma may cause damage to the optic nerve
- Retinal detachment
- Eye strokes can also lead to loss of peripheral vision. Moreover, damage to retina due to retinitis pigmentosa may also result in the loss of peripheral vision
- Brain damage
- A stroke or concussion.
Other common, yet less likely causes include:
- Chronic stress, intense anger, fear, anguish and anxiety
- Over and excessive production of adrenaline
- Exposure to oils and hydraulic fluids contaminated air
- Damage of brain due to intake of hallucinogenic drugs
- Sustained high acceleration
- Increased oxygen pressure above 1.5 to two atmospheres
- Increased utilization of alcohol
- Using corrective lens in eye glasses, rendering a narrow point of focus
- Wearing protective mask, safety goggles
- Wearing protective helmet like welding helmets or underwater diving mask
- Using Optical instruments as microscopes, binoculars and telescopes
Tunnel Vision Treatment
Early diagnosis and treatment such as regular intake of glaucoma medication can stop the progress of tunnel vision.
Vision Therapy technique
Specific vision therapy technique, revealed by researchers of New York University of Rochester Eye Institute, aids in repossession of some visual field loss.
Eyeglass prism technique
In certain cases of peripheral vision loss, doctors may recommend eye glasses with prism lens.
Tachistoscopic Training technique
Tachistoscopic training is useful in training people to deal with a smaller peripheral visual space.
Breathing and Relaxation Technique
Learned behaviors, such as controlled breathing and relaxation training can compensate for the effects of stress; thus, decreasing chances of tunnel vision.
Light Therapy technique Studies at the College of Syntonic Optometry proposed that proper phototherapy treatment lessens neurologically stimulated imbalance due to stress and helps in reducing the chance of developing tunnel vision.
People, suffering from temporary tunnel vision often don’t bother for a check-up, but this is a risky choice and can lead to permanent blindness if left unchecked. Visit an eye doctor as soon as possible if you notice a decrease in your peripheral vision.