Poor Dark Adaptation By The Eyes

What Causes Difficulty Adjusting To The Dark?

Difficulty adjusting to the dark can have various causes, ranging in severity from 'troubling' to 'very serious'.  Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.

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  • check your overall health status
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Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms.  In order to diagnose difficulty adjusting to the dark, we could:

  • Research the topic
  • Find a doctor with the time
  • Use a diagnostic computer system.
The process is the same, whichever method is used.

Step 1: List all Possible Causes

We begin by identifying the disease conditions which have "difficulty adjusting to the dark" as a symptom.  Here are six possibilities:
  • Zinc Need
  • Vitamin A Need
  • Cataracts
  • Macular Degeneration
  • Retinitis Pigmentosa
  • Liver Congestion

Step 2: Build a Symptom Checklist

We then identify all possible symptoms and risk factors of each possible cause, and check the ones that apply:
PPI antacid use
liver/gallbladder cleanses help
white spots on fingernails
grooves across fingernails
loss of appetite
breast soreness during cycle
discontinued calcium supplementation
sickness caused by wine
frequent infections
frequent hangnails
having had a small bowel resection
undigested fat in stools
... and more than 80 others

Step 3: Rule Out or Confirm each Possible Cause

A differential diagnosis of your symptoms and risk factors finds the likely cause of difficulty adjusting to the dark:
Cause Probability Status
Retinitis Pigmentosa 93% Confirm
Liver Congestion 73% Possible
Cataracts 18% Unlikely
Zinc Need 5% Ruled out
Vitamin A Need 2% Ruled out
Macular Degeneration 0% Ruled out
* This is a simple example to illustrate the process

Arriving at a Correct Diagnosis

The Analyst™ is our online diagnosis tool that learns all about you through a straightforward process of multi-level questioning, providing diagnosis at the end.

If you indicate eye problems, The Analyst™ will ask further questions including this one:
Vision - poor dark adaptation. Do you have difficulty seeing things when going from the light into a darkened room?
Possible responses:
→ No / don't know
→ Mildly - can see well after very brief adjustment
→ Moderately - I need time to adjust
→ Seriously - can see only a little after a while
→ Severely - can see nothing at all
Based on your response to this question, which may indicate poor dark adaptation, The Analyst™ will consider possibilities such as:
Cataracts

Cataracts, characterized by cloudiness of the lens, can cause night blindness.

Liver Detoxification / Support Requirement

Reduced night vision can be linked to a variety of conditions caused by impaired liver function which in turn reduces vitamin A metabolism.

Retinitis Pigmentosa

Retinitis pigmentosa results in visual rods being destroyed early in the course of disease, resulting in night blindness.  Night blindness in children may be an early indicator of retinitis pigmentosa.

Vitamin A Requirement

Night blindness is commonly caused by a deficiency in vitamin A.  It is considered one of the first indicators of vitamin A deficiency.

Zinc Requirement

Zinc is required in order to transport vitamin A from the liver to the retina and thus zinc supplementation, especially in those who are deficient, should help improve night vision.

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