THE VARIOUS PROCESSES AND CONTROLS INVOLVED IN THE VARIATION OF EYE MOVEMENTS ACCORDING TO READING MATERIAL ARE DISCUSSED. RELEVANT RESEARCH LITERATURE IS CITED, AND AREAS REQUIRING ADDITIONAL RESEARCH ARE OUTLINED. LANGUAGE TEXT CONTROL AND THE CENTRAL NERVOUS SYSTEM AS POSSIBLE LOCI OF CONTROL FOR EYE MOVEMENTS ARE EXPLORED. EVIDENCE SUPPORTING THE CONTROL OF EYE MOVEMENTS BY SEMANTIC REQUIREMENTS IS PRESENTED. IT IS CONCLUDED THAT LANGUAGE HAS SEQUENTIAL CONSTRAINTS INVOLVING LETTERS, WORDS, AND SEMANTIC CONTENT WHICH ENABLE A READER TO BE AWARE OF CERTAIN WORDS OR PHRASES WITHOUT ACTUALLY FOCUSING ON THEM. THE EFFECTS OF LOCATION OF A PARTICULAR WORD OR PHRASE IN A SENTENCE ON THE ABILITY OF A SOPHISTICATED READER TO DETERMINE THE WORD OR PHRASE ARE EXAMINED. THE PROCESSING OF LANGUAGE DATA IN RELATION TO SEQUENTIAL ORDER AND THE POSSIBILITY OF USING TRANSFORMATIONAL VARIATIONS OF SENTENCE FORMS TO STANDARDIZE OR INDEX EXTERNAL DEPENDENCIES OF EYE MOVEMENTS ON INTERNAL PROCESSES ARE ALSO DISCUSSED. A BIBLIOGRAPHY IS INCLUDED. THIS PAPER IS A PREPRINT TO APPEAR IN THE 16TH YEARBOOK OF THE NATIONAL READING CONFERENCE, 1967. (LS)