This website is split into seven major subheadings - outlined in the red bar immediately above this text (and also pictured below) - as well as a Quiz section for self-assessment.

This is the default display and lists all indexed diseases in this sub-specialty. Clicking on any disease name will bring up thumbnails of selected images (see Working With Thumbnails below for more information). If an arrow exists next to the disease name, then there are discrete cases listed under it. Clicking on these case names (e.g. Case 01) will allow you to view related images from one patient - many of which will have associated temporal descriptions as well as visit histories and comments from contributing physicians or editors.

This section allows the user to look specifically at clinical findings - even if they are associated with multiple different diseases. For instance, 'Cotton Wool Spots' will be present in images associated with HIV, hypertensive and diabetic retinopathy.

The editors have further categorized related diseases into groups such as 'White Dot Syndromes' and 'HIV-associated diseases.' One special category is called the 'Byer Peripheral Atlas.' These images are taken directly from Dr. Norman E. Byer's book The Peripheral Retina in Profile: A Stereoscopic Atlas, Criterion Press, 1982. These images are reproduced as monocular slides with his generous permission. A full stereo version of these slides along with his text is available directly from him for any interested parties.

Clicking on the Quiz heading at the left of the red toolbar brings up a special window with the sub-specialties listed in a gray toolbar. Listed below each topic is the number of unknown images available for this specialty. Clicking any of these subject headings will bring up an unlabelled image for identification. A yellow arrow in the upper right corner points to the answer page that gives both the diagnosis as well as any associated clinical information. The user can then choose to receive a new question in the same subspecialty or to be quizzed on images from any and all specialties. The computer randomly chooses images but does not track which ones have been displayed. Therefore, users may recognize the same image being presented in close succession. This does not mean that all images have been viewed - just that the random number generator has generated a duplicate result. These images are not enlargeable.

The first page for each disease or finding usually contains what are called thumbnail images. These are highly reduced versions of the larger images that load quickly. They will always be arranged into two columns. For case presentations, the columns will be labeled as OD and OS (although the bottom of some pages contain associated descriptive slides such as conference text slides or external photos). A yellow arrow may be present at the upper right corner of this screen which indicates that more slides associated with this case exist. You may page through the thumbnails for a case using these arrows or go to the medium-sized images instead (see Working With Medium Images below). For the 'Select Images' category, these thumbnails will not be arranged in any particular order. At the bottom of the thumbnails screen, the program may list a group of 'Related Diseases.' This will not be an exhaustive differential diagnosis and, in fact, may not pertain exactly to the case being displayed. It is a broad differential (for that particular diagnosis) of diseases that exist in the RedAtlas.org database. It allows the user to quickly click on links to other diseases that may look like the current one being viewed.

Clicking on one of the thumbnail images will open a new window (the program will always use the same window - so you don't have to close it each time) containing a larger resolution image along with the particular case history. Clicking on the arrow located in the upper right corner will forward the screen to the next slide in the series. If viewing a case, it will be the next slide associated with that particular eye so that you may view the progression or regression of a disease over time in a single eye. For the 'Selected Images' groups, it will simply be the next photo in line. Again, the RedAtlas.org differential may exist at the bottom of these pages. In addition, there may be a heading of 'Additional Findings' which provides links to other images that have the same findings seen in this photo. For instance, if the image being viewed conatains 'Fibrous Proliferation', then you may click on this link and see other images of diseases that contain fibrous proliferation. The larger photo being viewed may be downloaded by following the instructions at the bottom of the screen. Please also see our Usage Policy for a discussion of what you may do with these downloaded images. In addition, you may click on the image or follow the instructions at the bottom of the screen to view or download an even larger image. These slides are quite large in size and may take a long time to download, so please minimize your access to these images since it will overload the server.

A Search capability may be added in the future to allow users to find specific diseases even more quickly. At this time, it is not active. Please do not use Web robots or automated downloading software to receive images from this site. It will simply bog down our small server and prevent other people from accessing this free website. If you find a disease that appears to be improperly labeled, please email me at the address listed below. If you have slides that you would like to contribute, please email me and I will discuss submission guidelines with you. Thank you for using our site. I hope it is helpful.