Total 13 clinical symptoms reported for Kearns-Sayre syndrome  Very Frequent (3)Occasional (2)Frequent (8)

Abnormality of retinal pigmentation	Synonyms:Abnormal retinal pigmentation; Abnormality of retinal pigment epithelium; Abnormality of RPE; Retinal pigmentary anomaly	Very frequent
Progressive external ophthalmoplegia	Initial bilateral ptosis followed by limitation of eye movements in all directions and slowing of saccades.   Synonyms:External ophthalmoplegia, progressive	Very frequent
Third degree atrioventricular block	Third-degree atrioventricular (AV) block (also referred to as complete heart block) is the complete dissociation of the atria and the ventricles. Third-degree AV block exists when more P waves than QRS complexes exist and no relationship (no conduction) exists between them.   Synonyms:Complete heart block	Very frequent