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Updated: Jun 27, 2026

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
[Genetic counselling in visual and auditory disorders].
1Unidad de Genética, Hospital Universitario La Fe y Departamento de Genética, Universidad de Valencia y Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Valencia, Spain. millan_jos@gva.es
Genetic testing for inherited retinal dystrophies and hearing loss is complex due to numerous genes. New microarray technologies offer efficient molecular diagnosis and potential therapeutic strategies for these heterogeneous genetic disorders.
Area of Science:
- Genetics
- Ophthalmology
- Audiology
Context:
- Inherited retinal dystrophies and hearing loss disorders exhibit significant clinical and genetic heterogeneity.
- Over 200 genes are implicated in retinal disorders, and over 60 in hearing impairment, highlighting the complexity of genetic diagnosis.
Purpose:
- To review the genetic heterogeneity of retinal dystrophies and hypoacusis.
- To discuss recent advances in gene discovery and molecular diagnostic technologies.
- To explore novel therapeutic approaches for these conditions.
Summary:
- Molecular genetic testing is vital for diagnosing inherited retinal dystrophies and hearing loss, enabling precise prognoses, genetic counseling, and patient stratification for clinical trials.
- The large number of causative genes presents challenges in cost, time, and technical efficiency for comprehensive molecular testing.
- Emerging DNA-based microarray technologies offer potential solutions for efficient and effective molecular diagnosis.
Impact:
- Advances in gene discovery and diagnostic technologies improve the molecular diagnosis of inherited retinal dystrophies and hearing loss.
- Development of targeted therapies may improve clinical outcomes for patients with these genetic conditions.
- Facilitates accurate genetic and reproductive counseling and the formation of homogeneous patient cohorts for clinical research.
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