Question 1

what is the definition or description of: scotopic vision?

Accepted Answer

Dark adapted vision: Scotopic vision is vision in low light conditions. It is in contrast to photopic vision which is vision in high light conditions. Scotopic vision is generally more rod dependent than cone dependent.

Question 2

what is your non-vision time?

Accepted Answer

?????: I have never heard of this term but i guess it refers to periods without visual input (ie when eye are closed or during sleep).

Question 3

is 20/30 and 20/40 vision bad?

Accepted Answer

Depends: These are levels of vision that still indicate good and useful vision.  If you are used to 20/20 vision and you have a drops to 20/30 or 20/40 (uncorrectable) then it may seem bad to you.  In my state of washington, the break point for a driver's license is a vision level of 20/40, so the state does not consider this 'bad'.

Question 4

what is cause of declining vision?

Accepted Answer

Worsening vision: There are mutlipple reasons for blurry vision and an eye exam is needed to answer this question. It could be simply the need for glasses. Cataracts, macular degeneration and glaucoma are the most common medical causes. Please go see your eye M.D.

Question 5

what makes my vision randomly blur?

Accepted Answer

Dry eyes: This is mostly commonly due to dryness that leaves the natural oil layer of the eye's surface to predominate and blur your vision when you blink like an oil slick over water.  Try over the counter artificial tears 4-6 times a day.

Question 6

why is my vision going dark slowly?

Accepted Answer

PLEASE SEE AN EYE: Specialist as soon as possible. Many possibilities, some of them dangerous.

Question 7

what causes my vision to become dim?

Accepted Answer

Many causes: Dim vision can be caused by cataracts, retinal problems or optic nerve issues. The key detail needed to better answer the question is how often/ when does it occur. If it is frequent or continuous, you should see an eye doctor soon.

Question 8

why am i seeing prisms around my vision?

Accepted Answer

Migraine: You are probably experiencing occipital migraine.  You can confirm this by seeing if the same things occurs in each eye when you cover one and then the other.  These usually are short lasting (5 min to 2 hours) and cause no permanent changes.  If this test does not work as I have indicated, then see your ophthalmologist for a better diagnosis.

Question 9

what is my vision if i wear -4.5 contacts?

Accepted Answer

Hopefully 20/20: Are you asking what your vision would be if you were not wearing contact lenses or glasses?  You would be around 20/100 to 20/200 based on my experience.  This is assuming that you do see 20/20 with your -4.50 contact lenses.

Question 10

what causes bright squiggly lines in vision?

Accepted Answer

Migraine : Would be the most likely, but other possibilities exist as well, so you should see your ophthalmologist.

Get Virtual Care

For Businesses

About Us

HealthTap Online Primary Care Doctors Accepting New Patients

Doctor answers about:

What is scotopic vision

A member asked:

What is the definition or description of: scotopic vision?

A member asked:

What is your non-vision time?

A member asked:

Is 20/30 and 20/40 vision bad?

A member asked:

What is cause of declining vision?

A member asked:

What makes my vision randomly blur?

A member asked:

Why is my vision going dark slowly?

A member asked:

What causes my vision to become dim?

A member asked:

Why am i seeing prisms around my vision?

A member asked:

What is my vision if i wear -4.5 contacts?

A member asked:

What causes bright squiggly lines in vision?

HealthTap Online Primary Care Doctors Accepting New Patients

Telemedicine

Primary Care

Manage Your Conditions

Women's Health

Children's Health

Men's Health

Senior Health

Wellness, Prevention & Lifestyle

Sexual Health

Mental & Behavioral Health

Travel Medicine

Urgent Care

Didn't find what you're looking for?

More of what we treat

Allergies

Antibiotics

Asthma

High Blood Pressure

Prescriptions

Type 2 Diabetes

For Businesses

Company

Health Content

Join Us

Download HealthTap

Questions?