Ocular Glaucoma

Invitation to 'test our test' for finding hidden blindspots in your field of vision

Question:

Another problem I see right off the bat….the test instructions are very difficult to read due to background colour and poor definition of print…as a person with a very restricted visual field, problems with glare and poor acuity, I find white on black and black on white the best with at least a 12 point font. I know you can increase font size on web sites, but that sometimes alters presentation of the functional part of the website. Anyway, I did not enjoy the colour schemes…a small but difficult area for a lot of us to cope with. Bill

Response:

May I respectfully reply to those who disagree with self-testing of the visual field on the internet. First of all, our test measures the visual field to 24 degrees and not just 5 degrees, and this is possible because we use multiple fixation points. Second, our test is not designed to replace any conventional examinations and not intended as a means to avoid seeing a qualified practitioner. The purpose of our test is to bring visual field defects to attention so that proper care from a qualified practitioner can be obtained at an early stage. Third, the aim of our test is to detect moderate and advanced visual field defects indicating disease requiring the most urgent treatment. Fourth, self-testing of the visual field under medical supervision as an adjunct to clinic examinations has long been considered useful practice in selected patients, using the Amsler grid, for example in patients with macular degeneration. There is no reason why our test should not be used in the same way, if our research confirms its validity. We are still investigating our test to find out how well it works and are certainly not suggesting that it should replace other methods. If anyone wishes to try our test, do a search in Google for ‘Damato Visual Field Test’. Our test is free and we are non-commercial. Bertil Damato With regards to fears about failing, better to try and fail than not to try at all, as they say.

Response:

- Hide quoted text — Show quoted text -jimlaw…@tabbytail.freeserve.co.uk (Jim Lawton) wrote in message <news:3f73fe42.3408581@text.news.ntlworld.com>… > On Fri, 26 Sep 2003 04:05:55 GMT, Earle Jones <earle.jo…@comcast.net> wrote: > >In article <b0866067.0309251612.69bc4…@posting.google.com>, > > kpatt…@hotmail.com (lasik advocate with flap melt) wrote: > >> The links didn’t work on this. Is it working yet? > >> Earle Jones <earle.jo…@comcast.net> wrote in message > >> <news:earle.jones-1BE8F2.15541522092003@netnews.attbi.com>… > >> > In article <2317138e.0309220952.528f1…@posting.google.com>, > >> > ber…@damato.co.uk (Bertil Damato) wrote: > >> > > http://www.testvision.org/ > >> > * > >> > As of 3:53 PM PDT on 9-22-03, the above link works up to the "Basic – > >> > Standard – Advanced" screen and then hangs up. > >> > earle > >> > * > >* > >The link is still broken at 9:04 PM PDT on 9-25-03. > The basic test worked for right eye, but didn’t let me proceed to left eye. > the advanced intermediate test worked ok. Not tried advanced yet … > J > >earle > >*Sorry to learn that the basic test does not let you proceed from the right eye to the left eye. This should be fixed this weekend. Please continue to let us know of any problems so that we can correct them. It is surprisingly difficult for us developers to detect our own errors. Your feedback is therefore very helpful.

Bertil Damato

Response:

In article <2317138e.0309220952.528f1…@posting.google.com>, ber…@damato.co.uk (Bertil Damato) wrote: > http://www.testvision.org/

* As of 3:53 PM PDT on 9-22-03, the above link works up to the "Basic – Standard – Advanced" screen and then hangs up. earle *

Response:

Well Donald I decided to abstain -since i fear failing the darn thing — ; )

~~~~~~~~~~~~~~~~later trish ~

Response:

For what it’s worth, I agree totally with Dr. Cohen. I looked at the web site, and I suppose it could be helpful to some people. But what came to my mind was the old proverb, "Man who acts as his own lawyer has a fool for a client." Insert "opthalmologist" for "lawyer" and "patient" for "client." (And add "or woman" to include the other half of the human race! :-) – Hide quoted text — Show quoted text -Bertil Damato wrote: > Mr Carl Groenewald and I are consultant eye surgeons in England. In > our spare time, we have developed a visual field test for the > internet, which allows anyone to perform self-examination, using a > personal computer and at their own convenience, free of charge. > Our test may enable people to become aware of visual loss and perhaps > to check whether they are improving or getting worse. Some might > become detect new defects so that they can obtain medical advice or > take special precautions, for example if they drive a car. > Conditions causing visual field loss include glaucoma, retinal > detachment, macular degeneration, pituitary tumours, other brain > tumours, strokes, Sturge Weber syndrome, von Hippel Lindau disease, > and many others. Not all visual field defects indicate serious disease > and false positive and negative results can occur (with any test). > I would be grateful if anyone could participate in our research > project and help us evaluate our test. We urgently need persons with > visual field defects to visit our website and send us feedback so that > we can make improvements. Hopefully the test will be found > interesting, a little like a computer game. It is quite different from > conventional tests so please read the instructions, see the demo and > do a rehearsal before trying the test. If you could perform the > sensitive version of the test, this would be ideal. > Our website is at http://www.testvision.org/ > Please remember to e-mail us the results with your email address if we > may reply to you (but note that we are only able to comment on your > result and not on any ocular or medical problem you might have). > It would be helpful if you let us know what you like or don’t like > about our test. > Yours faithfully, > (Professor) Bertil Damato PhD FRCOphth > St Paul’s Eye Unit > Royal Liverpool University Hospital > Prescot St > Liverpool L7 8XP > Tel: +44 (0)151 706 3973 > Fax: +44 (0) 151 706 5436 > E-mail: Ber…@damato.co.uk

Response:

Bertil Damato wrote: > May I respectfully reply to those who disagree with self-testing of > the visual field on the internet. > … > We are still investigating our test to find out how well it works and > are certainly not suggesting that it should replace other methods.

I found the test instructions confusing: look at the blue dot and put the red one in the normal blind spot — I have not a clue what that means. There also seems to be a test consistency problem vis a vis use of the mouse. Assuming the mouse stays where it is, placing the opposite hand over an eye will likely garner different results than using a foreign object (tissue, cloth) to cover an eye, but then getting that object to stay in place is not so easy without taping. Gene Goldenfeld

Response:

The links didn’t work on this. Is it working yet? – Hide quoted text — Show quoted text -Earle Jones <earle.jo…@comcast.net> wrote in message <news:earle.jones-1BE8F2.15541522092003@netnews.attbi.com>… > In article <2317138e.0309220952.528f1…@posting.google.com>, > ber…@damato.co.uk (Bertil Damato) wrote: > > http://www.testvision.org/ > * > As of 3:53 PM PDT on 9-22-03, the above link works up to the "Basic – > Standard – Advanced" screen and then hangs up. > earle > *

Response:

The advanced test does not work properly the smiley appears…..I click on it….a black circle appears…..and then is replaced by a smiley….*before* i click on it.

Response:

Dear group: what causes hemorrhages on the optic nerve? Leigh

Response:

- Hide quoted text — Show quoted text -On Fri, 26 Sep 2003 04:05:55 GMT, Earle Jones <earle.jo…@comcast.net> wrote: >In article <b0866067.0309251612.69bc4…@posting.google.com>, > kpatt…@hotmail.com (lasik advocate with flap melt) wrote: >> The links didn’t work on this. Is it working yet? >> Earle Jones <earle.jo…@comcast.net> wrote in message >> <news:earle.jones-1BE8F2.15541522092003@netnews.attbi.com>… >> > In article <2317138e.0309220952.528f1…@posting.google.com>, >> > ber…@damato.co.uk (Bertil Damato) wrote: >> > > http://www.testvision.org/ >> > * >> > As of 3:53 PM PDT on 9-22-03, the above link works up to the "Basic – >> > Standard – Advanced" screen and then hangs up. >> > earle >> > * >* >The link is still broken at 9:04 PM PDT on 9-25-03.

The basic test worked for right eye, but didn’t let me proceed to left eye. the advanced intermediate test worked ok. Not tried advanced yet … J – Hide quoted text — Show quoted text ->earle >*

Response:

Thanks for replyng DR. Cohn .

~~~~~~~~~~~~~~~~later trish ~

Response:

"Rick Cohn, M.D." wrote: > Isolated disc hemorrhages are most commonly seen in low tension > glaucoma or primary open angle glaucoma. Those associated with nearby > bleeding, or bleeding elsewhere in the retina are common in diabetics > with active retinopathy or in those with a retinal vein occlusion.

Do hemorrhages on the optic disc result in more damage of the optic nerve? Gudny I.

Response:

In article <54e8377c.0309280723.5a134…@posting.google.com>, eyegu…@aol.com (Rick Cohn, M.D.) wrote: – Hide quoted text — Show quoted text -> TNARTL…@webtv.net (( TN Artist, trish,tn )) wrote in message > <news:10189-3F761562-101@storefull-2318.public.lawson.webtv.net>… > > What is this about ? Did you check this out ? Is is legit ? > Here’s my take on these "Check your visual field at home on your PC" > type of tests (this is not a new thing…there have been others). > First of all, a Humphrey field analyzer has a screen that more or less > wraps around you to test a much larger angle of your field. The 30-2, > the most commonly used field testing program, tests the central 30 > degrees of your field. As most people are 16 to 20 inches away from > their monitors, the monitor takes up a much smaller area of your > retina, maybe the central 5 – 10 degrees. This will vary, of course, > depending on the size of one’s monitor and the distance from the > screen. In glaucoma, by the time your field loss is significant enough > to encroach on the central 5 degrees, you have already lost a very > large area of vision and probably have greater than 85-95% optic nerve > damage. > While there is some basic usefulness in these types of tests, it > ONLY resides in there ability to get some people thinking and talking > about glaucoma. It may raise concern just enough in a few to get an > eye exam where they otherwise might not. It is very important to keep > in mind that even the most sensitive field tests (e.g. the SWAP > blue-on-yellow test, which detects glaucoma earlier than the standard > field test) do not detect any field loss till the optic nerve > essentially has a 0.6 cup or greater. In other words, some optic > nerve damage has clearly already occured before field loss shows up. > Mostly, this online field test is a fun little exercise to be tried at > home, but it should NEVER take the place of routine follow-up and > annual field tests in your ophthalmologist’s office. I can’t stress > that enough. Hope that helps. > Sincerely, > Rick Cohn, MD > Glaucoma Specialist > Winter Park, FL

I’ve taken the liberty of reposting this to the Yahoo.com glaucoma mailing list.

Response:

> >Yes, in fact with time the hemorrhage will resolve, often leading to a > >focal "notch" in the rim of the optic nerve…this usually corresponds > >to a defect near the center of vision on the visual field test. > >Again, this is most commonly seen in low-tension glaucoma. > >–Rick Cohn, MD > What should one do if one of these hemorrhages occurs?

Usually this is an indication that one’s intraocular pressure is not sufficiently controlled. Usually the ophthalmologist will work towards lowering the IOP somewhat more with a change in medications or adding and additional eyedrop. –Dr. Cohn

Response:

On 15 Oct 2003 19:29:29 -0700, eyegu…@aol.com (Rick Cohn, M.D.) wrote: – Hide quoted text — Show quoted text ->"Isachsen" <origirem…@c2i.net> wrote in message <news:mThjb.22561$BD3.4281659@juliett.dax.net>… >> "Rick Cohn, M.D." wrote: >> > Isolated disc hemorrhages are most commonly seen in low tension >> > glaucoma or primary open angle glaucoma. Those associated with nearby >> > bleeding, or bleeding elsewhere in the retina are common in diabetics >> > with active retinopathy or in those with a retinal vein occlusion. >> Do hemorrhages on the optic disc result in more damage of the >> optic nerve? >> Gudny I. >Yes, in fact with time the hemorrhage will resolve, often leading to a >focal "notch" in the rim of the optic nerve…this usually corresponds >to a defect near the center of vision on the visual field test. >Again, this is most commonly seen in low-tension glaucoma. >–Rick Cohn, MD

What should one do if one of these hemorrhages occurs?

Response:

In article <b0866067.0309251612.69bc4…@posting.google.com>, kpatt…@hotmail.com (lasik advocate with flap melt) wrote: > The links didn’t work on this. Is it working yet? > Earle Jones <earle.jo…@comcast.net> wrote in message > <news:earle.jones-1BE8F2.15541522092003@netnews.attbi.com>… > > In article <2317138e.0309220952.528f1…@posting.google.com>, > > ber…@damato.co.uk (Bertil Damato) wrote: > > > http://www.testvision.org/ > > * > > As of 3:53 PM PDT on 9-22-03, the above link works up to the "Basic – > > Standard – Advanced" screen and then hangs up. > > earle > > *

* The link is still broken at 9:04 PM PDT on 9-25-03. earle *

Response:

"Isachsen" <origirem…@c2i.net> wrote in message <news:mThjb.22561$BD3.4281659@juliett.dax.net>… > "Rick Cohn, M.D." wrote: > > Isolated disc hemorrhages are most commonly seen in low tension > > glaucoma or primary open angle glaucoma. Those associated with nearby > > bleeding, or bleeding elsewhere in the retina are common in diabetics > > with active retinopathy or in those with a retinal vein occlusion. > Do hemorrhages on the optic disc result in more damage of the > optic nerve? > Gudny I.

Yes, in fact with time the hemorrhage will resolve, often leading to a focal "notch" in the rim of the optic nerve…this usually corresponds to a defect near the center of vision on the visual field test. Again, this is most commonly seen in low-tension glaucoma. –Rick Cohn, MD

Response:

Mr Carl Groenewald and I are consultant eye surgeons in England. In our spare time, we have developed a visual field test for the internet, which allows anyone to perform self-examination, using a personal computer and at their own convenience, free of charge. Our test may enable people to become aware of visual loss and perhaps to check whether they are improving or getting worse. Some might become detect new defects so that they can obtain medical advice or take special precautions, for example if they drive a car. Conditions causing visual field loss include glaucoma, retinal detachment, macular degeneration, pituitary tumours, other brain tumours, strokes, Sturge Weber syndrome, von Hippel Lindau disease, and many others. Not all visual field defects indicate serious disease and false positive and negative results can occur (with any test). I would be grateful if anyone could participate in our research project and help us evaluate our test. We urgently need persons with visual field defects to visit our website and send us feedback so that we can make improvements. Hopefully the test will be found interesting, a little like a computer game. It is quite different from conventional tests so please read the instructions, see the demo and do a rehearsal before trying the test. If you could perform the sensitive version of the test, this would be ideal. Our website is at http://www.testvision.org/ Please remember to e-mail us the results with your email address if we may reply to you (but note that we are only able to comment on your result and not on any ocular or medical problem you might have). It would be helpful if you let us know what you like or don’t like about our test. Yours faithfully, (Professor) Bertil Damato PhD FRCOphth St Paul’s Eye Unit Royal Liverpool University Hospital Prescot St Liverpool L7 8XP Tel: +44 (0)151 706 3973 Fax: +44 (0) 151 706 5436 E-mail: Ber…@damato.co.uk

Response:

joell…@aol.com (JoellynR) wrote in message <news:20031011071703.05539.00001469@mb-m16.aol.com>… > Dear group: what causes hemorrhages on the optic nerve? Leigh

Isolated disc hemorrhages are most commonly seen in low tension glaucoma or primary open angle glaucoma. Those associated with nearby bleeding, or bleeding elsewhere in the retina are common in diabetics with active retinopathy or in those with a retinal vein occlusion. -Rick Cohn, MD Glaucoma specialist Winter Park, FL

Glaucoma Disease

Information about Glaucoma

Ocular Glaucoma

Invitation to 'test our test' for finding hidden blindspots in your field of vision

Question:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Response:

Related Posts

Write a comment