Lecture #

Brief Outlines

Lecture   1

Introduction: Sign Convention; Nomenclature (Naming system); Notations

Lecture  2

Ophthalmic Lens Materials (1):  Manufacture of optical Glass; Types of optical glass; properties and desirable qualities of ophthalmic glass

Lecture  3

Ophthalmic Lens Materials (2): Plastic Lenses; manufacturing processes for plastics

Lecture  4

Ophthalmic Lens Materials (3): CR39; Polycarbonates; Corlon lenses

Lecture  5

Power Specification and Measurement (1): Approximate power; Back vertex power and front vertex power

Mid –Term Exam 1

Lecture  6

Power Specification and Measurement (2):  Equivalent power; Effective power; Worked problems; Correction of homework problems;

Lecture  7

Form of a lens: Flat Lens; Curved lens (meniscus lens); periscopic lens;

Lecture  8

Power Measurement:  Hand neutralization; Full practical session;

Lecture  9

Identification of Lenses: Rotation test;  Astigmatic lenses;  Crossed cylinders + exercises

Lecture  10

Transposition: Rules transposition; worked problems

Mid –Term Exam 2

Lecture  11

Lens Power & Thickness: Sagitta Formula; Ophthalmic prisms and decentration (1): Prentice's rule

Lecture  12

Ophthalmic prisms and decentration (2): Solved problems;  Prismatic effects of cylindrical lenses;

Lecture  13

Specification of Lens and Frame Sizes; Decentration;  Risely and Fresnel prisms