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January 1940

Rétine humaine et phénomènes entoptiques.

Arch Ophthalmol. 1940;23(1):223-224. doi:10.1001/archopht.1940.00860130237022

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Fortin's monograph, published in a limited edition, presents the results of extremely accurate research work which he has carried on for almost thirty years and published in a great number of articles in different periodicals.

The first and most important part deals with so many problems of the retina that only a brief review of the outstanding findings can be given—a review which shows clearly the revolutionary character of Fortin's statements and ideas.

Fortin found that the pigment epithelium of the retina appears on cross section in the form of small disks. The cells are not hexagonal. Rods and cones are equal in length. The neuroepithelium of the macular region is distinguished by its uniformity. Its elements should not be defined as cones but as a special structure with intermediate characteristics. Fortin considers the membrana limitans externa as a fine uninterrupted membrane with minute openings which is connected with the

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