Optical Article

1 . An optical article comprising:

an optical base material;

a primer layer formed on the optical base material;

a binder layer; and

a hardcoat layer formed on the primer layer via the binder layer,

the primer layer having a thickness of at least 700 nm,

the binder layer having a lower refractive index than the refractive index of the primer layer and the refractive index of the hardcoat layer, and

the binder layer having a thickness of at least 35 nm.

2 . The optical article of claim 1 , wherein the primer layer has a thickness of at least 800 nm.

3 . The optical article of claim 1 , wherein the primer layer has a thickness of at least 900 nm.

4 . The optical article of claim 1 , wherein the primer layer has a thickness of at least 1,000 nm.

5 . The optical article of claim 1 , wherein the binder layer has a thickness of at least 50 nm.

6 . The optical article of claim 1 , wherein the optical base material has a refractive index of at least 1.7.

7 . The optical article of claim 1 , further comprising an inorganic, multilayer antireflective layer formed on the hardcoat layer.

8 . The optical article of claim 1 , wherein the optical base material is a lens base material.

9 . A method for manufacturing an optical article, the method comprising:

applying and temporarily calcining a first composition used to form a primer layer on an optical base material; and

forming a laminate on the optical base material by applying and calcining a second composition used to form a hardcoat layer,

the laminate being formed under controlled temporary calcining temperature so as to laminate: the primer layer on the optical base material; a binder layer of lower refractive index than the refractive index of the primer layer; and the hardcoat layer.

10 . A method for designing an optical article provided with a binder layer-containing laminate that includes: a primer layer on an optical base material; a binder layer of lower refractive index than the refractive index of the primer layer; and a hardcoat layer,

the method comprising setting the thickness of the primer layer in the binder layer-containing laminate to a second thickness that is at least twice as thick as a first thickness of a primer layer of a binder layer-less laminate that includes the primer layer and a hardcoat layer laminated on an optical base material.