The over 1040 cases can be selected through a variety of mechanisms:

Keyword search:

Look for cases containing a keyword or phrase anywhere in the text of the case.

Anatomical location:

Select cases from a list of anatomical locations.(1)

Clinical description:

Select cases from an alphabetic list of clinical descriptions.(1)

Histopathology description:

Select cases from an alphabetic list of histopathology descriptions.(1)

Views of normal tissue:

Select cases from an alphabetic list of images showing "normal" tissues.(1)

Cogan collection case number:

Cases within the collection are sequentially numbered. You may select cases by either entering the case number(s) or checking specific cases from a list of all case numbers.

All the lists are divided into "pages" about 10 lines long.

Note 1: From within any of the alphabetic lists above you may use your browser's "find" button to refine your search.

Case Web Page Organization

The selected cases are presented in order by their case number and visually separated by quick links to the other selected cases. The quick links contain references to each case by number, the first, last cases, the next and previous cases, and the top of the web page. The pages are oriented so that the "next case" link appears at the same place on the screen so that you may conveniently click through the cases.

Case Information Presentation

Case information is displayed with headings identifying the following areas:

Case number:

The sequential number assigned to this case. This may be used to refer to a specific case.

Anatomical location:

The anatomic locations represented.

Clinical description:

A brief clinical description.

Histopathology description:

A brief histopathology description.

Normal slides:

An optional list of images of "normal" tissues and structures.

Clinical information:

Dr. Cogan's detailed clinical information. References to clinical photographs is by number; for example "[2]".

Clinical photographs:

Small images illustrating the clinical condition appear next to or under the description. Each photograph is identified with the corresponding number text. Photographs are sequentially numbered within each case and are displayed in sequential order. Larger images are available by clicking on the small image or the photograph's reference number. The large images are opened in a separate browser window allowing multiple images to be viewed simultaneously.

Histopathology exam:

Dr. Cogan's detailed description of the histopathology examination. References to histopathology exam photographs is by number; for example "[7]".

Histopathology exam photographs:

Small images illustrating the histopathology appear next to or under the exam description. Each photograph is identified with the corresponding number text. Photographs are sequentially numbered within each case and are displayed in sequential order. Larger images are available by clicking on the small image or the photograph's reference number. The large images are opened in a separate browser window allowing multiple images to be viewed simultaneously.

Use of Images

The David G. Cogan Ophthalmic Pathology Collection is an online resource coordinated by the National Eye Institute (NEI), part of the National Institutes of Health (NIH). Images in the collection are not copyrighted and may be reproduced without permission. However, we do ask that credit be given to the "Cogan Collection, NEI/NIH."