The invention relates to the fields of medicine and biotechnology. In particular, it relates to novel antisense oligonucleotides (AONs) that may be used in the treatment, prevention and/or delay of Stargardt disease and/or ABCA4-associated eye disease. More in particular, the invention relates to AONs that are used in inhibiting or blocking exon 39 skipping in the human ABCA4 pre-mRNA.