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Doctor insights on: Eye Test Chart Online

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How can you measure visual acuity w/ the snellen eye chart?

How can you measure visual acuity w/ the snellen eye chart?

Read smallest line: The snellen chart is a graded series of letters or numbers smaller as you go down. The uncorrected vision is the smallest line easily read with each eye. Your ophthalmologist will present you with lenses to improve the level of the smallest line to hopefully get you to 20/20 - the standard of normal. It is a subjective test requiring your active input. ...Read more

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DMV test 50 deg on left. Humphrey field normal. ophthalmologist thinks DMV test wrong but didn't suggest Goldman test for comparison. Should I insist?

DMV test 50 deg on left. Humphrey field normal. ophthalmologist thinks DMV test wrong but didn't suggest Goldman test for comparison. Should I insist?

Yes, ask for Goldman: The DMV test is a very quick and dirty test of visual field impairment. The Goldman test, in the hands of an experienced EYE MD (opthalmologist) is far more accurate and should be ordered if the DMV test is causing problems for employment, etc. ...Read more

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Please recommend an accurate, printable online psychological test?

Any online: Any test online is not an 'industry standard' and subjected to rigorous peer review and data sampling. ...Read more

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How can you calculate visual acuity based on eyeglass prescription?

How can you calculate visual acuity based on eyeglass prescription?

Simplistic: The simplistic answer is that a good optometrist/ophthalmologist knows what acuity corresponds with what prescription. I don't think you will find a formula to calculate this. ...Read more

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How accurate are online IQ tests?

How accurate are online IQ tests?

Sketchy: As accurate as you want them to be. That is, "real" IQ tests are taken in a controlled, supervised environment. They are also interpreted by professionals who take int account the test-taking environment. Automatic, on line tests o none of that. ...Read more

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Test name PSA screen 0.18. Next blank spot has =1=.... Free tv 1.18.. TSH 1.863.. Comments =1=the PSA is a direct chemiluminometric immunoassay mean?

Test name PSA screen 0.18. Next blank spot has =1=.... Free tv 1.18.. TSH 1.863.. Comments =1=the PSA is a direct chemiluminometric immunoassay  mean?

See below: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your lab results are normal. ...Read more

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Glaucoma rt. eye.Humphrey field test full within normal limits.DMV peripheral vision test 50 deg left & 70 deg right. Dr says DMV test wrong.Possible?

Glaucoma rt. eye.Humphrey field test full within normal limits.DMV peripheral vision test 50 deg left & 70 deg right. Dr says DMV test wrong.Possible?

Depends: Most Humphrey testing is 30-50 degrees from the center simply because ones that measure farther out take too long a time and most glaucoma changes start in the center. The DMV tests check a couple of horizontal points about 60 degrees and 130 degrees out. So it depends upon which testing you went through. Hopefully, with a glaucoma diagnosis, you are seeing a real doctor - an ophthalmologist. ...Read more

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My eye doctor wants to do an Optic Coherence Tomography test. What is this test for?

My eye doctor wants to do an Optic Coherence Tomography test. What is this test for?

CT of retina/optic d: It's basically ct of optic disc and retina to evaluate papilledema, optic disc structure, retinal vessels, etc ...Read more

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Is being able to read line 8 on the snellen eye chart a rare ability?

Is being able to read line 8 on the snellen eye chart a rare ability?

No: It depends on the size of the print on "line 8" and the distance from the chart. It is common for people to read the 20/15 equivalent, and not unusual to read 20/12, but the limit is probably about 20/10. ...Read more

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How accurate are online scan pregnancy test?

How accurate are online scan pregnancy test?

Urine test is better: Testing one's urine is so simple and so accurate that there is no reason to bother with an online survey. An online test cannot give a definite answer (it has no sample of one's blood or urine), so it can only make a guess (hopefully and educated guess). ...Read more

Dr. Tony Ho Dr. Ho
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Where can regular consumers (me) can purchase the orasure hiv/hepatitis instant test kits?

Dr. Tony Ho Dr. Ho
4 doctors agreed:
Where can regular consumers (me) can purchase the orasure hiv/hepatitis instant test kits?

Pharmacy: Most national chain pharmacies, such as cvs or walgreens, will carry the oraquick. ...Read more

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How acurate are at home hemoglobin monitors ? Can i rely on this monitor to show accurate hemoglobin levels?

See below: These are only moderately accurate but give you a fairly decent idea of your hemoglobin for instance if it should drop suddnley that would be significant. ...Read more

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Could eye doctors check for eye cancer?

Could eye doctors check for eye cancer?

Yes: There are different possible cancer that can affect the eye. An ophthalmologist will evaluate the eye with different techniques and hopefully detect any abnormality. Make sure you tell him/her of any symptom. ...Read more

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Could use your help docs! my distance vision is still blurry after new glasses. Snellen chart not working for the real world?

Need to have : The glasses and prescription repeated. Some times to person doing the test stops before rechecking and the strength of the glasses may be off. ...Read more

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How do eye doctors test for astigmatism?

How do eye doctors test for astigmatism?

Astigmatism: Astigmatism can be corneal (football shaped cornea)in origin or lenticular (crystalline lens). The first test to give it away is vision testing. Refraction tests quantify and confirm astigmatism wavefront measurement further accentuates values of primary & secondary astigmatism including associated coma. Corneal topography, opd analysis & ray tracing can even differentiate lens vs cornea astigm. ...Read more

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Do you know the highest myopic refraction on record?

Do you know the highest myopic refraction on record?

No records: I am unaware of any registry of this, but the highest I have personally seen in -28. ...Read more