negative lens
4.Left-handed metamaterials (LHMs) are characterized by a negative effective permittivity and simultaneously a negative effective permeability, and present a variety of unusual electromagnetic and optical properties, such as reversed Doppler shift, Cherenkov radiation, Goos-Hanchen shift, negative refraction effect and perfect lens, etc.
9.2. All affected individuals displayed bilateral lens opacities, and pulverulentcataract cataract with variable severity. 3. The LOD score of each selected markers ADCC in FANS family was negative. 4. An abnormal band was found by SSCP in a patient, and sequence analysis proved a deletion of CA in none coding region of GJA3 gene.

