Abstract
THE UNSATISFACTORY status of the current treatment of retinitis pigmentosa is too well known to need emphasis; hence any treatment reliably reported to be effective is worthy of investigation. It is the purpose of the present study to evaluate the treatment with cod liver oil and placental implantations which was reported by Filatov and his co-workers<sup>1</sup>to be highly successful. A brief survey of the literature follows. For a more complete history, the reader is referred to the valuable papers of Gordon.<sup>2</sup> The theory that the disease is dependent on choroidal sclerosis and attenuation of the retinal arteries has led to various attempts at vasodilation. Duke-Elder<sup>3</sup>summarized the host of experiments in this direction by stating that, "while their practice frequently leads to some transient improvement, doubtless owing to the increased circulation and metabolic activity excited in the eye, the ultimate results have been disappointing." Biró,<sup>4</sup>
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