<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
span.E-mailStijl18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.E-mailStijl19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#44546A;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1092044126;
mso-list-type:hybrid;
mso-list-template-ids:1139549412 68354063 68354073 68354075 68354063 68354073 68354075 68354063 68354073 68354075;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="NL" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A">Dear Andy, Chris, Pete, Gislin, Rowan, Marianne, Angela, Kenneth, Vincent, Ruth, Luisa, John,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A">Thank you all very much for your thorough, honest, interesting, and fruitful replies to my question!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A">The new cards are prototypes in development at Visio, and meant to replace the TAC. For that purpose I may conclude that they are not suitable. They are not ready yet to be used in clinical daly
practice, since normative data are lacking, but also tere are some critical issue concerning the theoretical basis and the production of these cards.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A">I hope we will be able to intergrade your remarks in improving the new cards. I will be informed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A;mso-fareast-language:NL"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A;mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:#44546A;mso-fareast-language:NL">drs. M.J. de Vries 69024716001<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#44546A;mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Revalidatieoogarts<o:p></o:p></span></b></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Koninklijke Visio Noord-West Nederland Revalidatie & Advies<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Hettenheuvelweg 41-43 1101 BM Amsterdam<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">T</span></b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL"> 088 585 57 23/585 57 00
<b>M </b>0031 (0)6 50 51 86 13<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Kinderoogarts-Ophthalmogenetica-Strabologie-Revalidatie<o:p></o:p></span></b></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Universitair Ziekenhuis Antwerpen afdeling ophthalmologie<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">Wilrijkstraat 10<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">2650 Edegem<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL">T</span></b><span style="font-size:10.0pt;color:#44546A;mso-fareast-language:NL"> +32 3 821 30 00
<b>M</b> +31 6 50518613<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A;mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#44546A"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:NL">Van:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:NL"> visionlist [mailto:visionlist-bounces@visionscience.com]
<b>Namens </b>Meindert de Vries<br>
<b>Ve</b></span><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:NL">rzonden:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:NL"> donderdag 13 februari 2020 15:14<br>
<b>Aan:</b> visionlist@visionscience.com<br>
<b>Onderwerp:</b> [visionlist] Teller Acuity Cards<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Dear members ,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Since 1992 I </span><span lang="EN-GB">work</span><span lang="EN-US"> for Visio, an institution the helps visually
</span><span lang="EN-GB">impaired people</span><span lang="EN-US">. We have always been using the Teller Acuity Cards to determine the visual acuity in children.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">A new test has been presented on the scene, proposing to replace the Teller Acuity cards, because the TAC are expensive and sometime difficult to get. I enclose an example picture of the new cards.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From my perspective and knowledge they have made some fundamental errors<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">The test seems ambiguous to me, because both object recognition part of our visual system as well as the much ‘lower” detection part of our visual system is triggered by this stimulus<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">The spatial frequency content of these stimuli (checkerboard patterns with a distinctive contour) is in the Fourier domain essentially different from the TAC bar patterns without a contour; nevertheless the
same cycl/cm are used. <o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">In addition to point 2: I think that the contour is a much stronger stimulus than the checkerboards.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Could anybody reflect on this ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:NL">Most kindley,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;mso-fareast-language:NL">drs. M.J. de Vries 69024716001<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;mso-fareast-language:NL">Revalidatieoogarts<o:p></o:p></span></b></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;mso-fareast-language:NL">Koninklijke Visio Noord-West Nederland Revalidatie & Advies<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:10.0pt;mso-fareast-language:NL">Hettenheuvelweg 41-43 1101 BM Amsterdam<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;mso-fareast-language:NL">T</span></b><span style="font-size:10.0pt;mso-fareast-language:NL"> 088 585 57 23/585 57 00
<b>M </b>0031 (0)6 50 51 86 13<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;mso-fareast-language:NL">Kinderoogarts-Ophthalmogenetica-Strabologie-Revalidatie<o:p></o:p></span></b></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;mso-fareast-language:NL">Universitair Ziekenhuis Antwerpen afdeling ophthalmologie<o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;mso-fareast-language:NL">Wilrijkstraat 10<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;mso-fareast-language:NL">2650 Edegem<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;mso-fareast-language:NL">T</span></b><span lang="EN-US" style="font-size:10.0pt;mso-fareast-language:NL"> +32 3 821 30 00
<b>M</b> +31 6 50518613<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:NL"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;mso-fareast-language:NL"><o:p> </o:p></span></b></p>
<div class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;mso-fareast-language:NL">
<hr size="2" width="100%" align="center">
</span></b></div>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;mso-fareast-language:NL">DISCLAIMER. De informatie verzonden met dit e-mailbericht is uitsluitend bestemd voor de geadresseerde. Gebruik van deze informatie
door anderen dan de geadresseerde is verboden. Openbaarmaking, vermenigvuldiging, verspreiding en/of verstrekking van deze informatie aan derden is niet toegestaan. Visio staat niet in voor de juiste en volledige overbrenging van de inhoud van een verzonden
e-mail, noch voor tijdige ontvangst daarvan. <o:p></o:p></span></b></p>
<div class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;mso-fareast-language:NL">
<hr size="2" width="100%" align="center">
</span></b></div>
</div>
</body>
</html>