Eye-movements represent a great interest in studying the specificity of the reading difficulties that individuals with developmental dyslexia have. In the present study dyslexic children were pair-matched with control children in a sentence reading task. The children read sentences in Bulgarian a Cyrillic alphabet language with regular orthography. Target nouns with controlled frequency and length were embedded in the sentences. Eye movements revealed highly significant group differences in the gaze time and the total fixation times, word frequency and word length effects as well as interaction for both frequency and length with the group factor. These results, especially the frequency effect found in the dyslexic children, are discussed in the context of previous studies.