VISUAL OPTICS II

Teacher

sourajit kumar banerjee

Category

Core Courses

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Code(Credit) :CUTM1791 (3+2+0)

Objective

This course deals with the concept of eye as an optical instrument and thereby covers different optical components of eye, types of refractive errors, clinical approach in diagnosis and management of various types of refractive errors.

Learning outcome

Upon completion of the course, the student should be able:

1. To understand the fundamentals of optical components of the eye

2. To gain theoretical knowledge and practical skill on visual acuity measurement, objective and subjective clinical refraction.

 

SYLLABUS & SESSION PLAN

Module-I(9 hrs)

Recent myopia development, myopia control, pathological myopia, pseudo myopia;

Recent advancements in refractive errors;

Accommodation related to hyperopia & Presbyopia;

Different types of refraction, drugs and administration;

Practice: Retinoscopy for simple, compound & Oblique astigmatism;

Module-2 (8 hours)

Accommodation, Presbyopia;

Hypermetropia and accommodation;

Range and amplitude of accommodation, variation of accommodation with age;

Anomalies of accommodation;

Accommodation: Far and near points of accommodation;

Practice: Practice of Retinoscopy in special cases - media opacities, irregular astigmatism

Module-3 (9hrs)

Convergence types, measurement and anomalies;

Relationship between accommodation & convergence, AC/A ratio.

 

Module-4 (8hrs)

Objective Refraction: Static & Dynamic;

Streak retinoscopy;

Principle, procedure, difficulties and interpretation of findings;

Dynamic retinoscopy and near retinoscopy;

Cycloplegic refraction.

Practice: Presbyopia correction and methods : Accommodative reserve, balancing the relative accommodation and Cross Grid test

Module-5 (8hrs) Subjective Refraction:

Review of subjective refractive methods;

Finding out the astigmatism in different methods;

Duo chrome, binocular balancing;

Difficulties in subjective and objective tests and their avoidance;

Practice: Subjective Refraction, Binocular balancing.

Module-6 (6hrs)

Ocular refraction versus spectacle refraction;

Ocular accommodation versus spectacle accommodation;

Spectacle magnification and relative spectacle magnification;

Retinal image blur; depth of focus and depth of field;

Module-7(8hrs)

Anisometropia, Aniseikonia,Amblyopia, Aphakia and Pseudophakia;

Night myopioa and purkinje shift

 

Text Books:

  1. 1. Clinical Visual optics Arthur G Bennett Ronald B Rabbetts -Butterworth- Heinemann Second edition 1989
  2. Visual Optics and Refraction- A clinical approach David D Michaels: The C.V. Mosby Co., 1985.

Reference Books:

  1. Clinical Optics Geometrical and Visual Optics A Clinical Introduction 3rd EdClinical Optics elkington-3ed, Andrew R Elkington& Helena J Frank - Blackwell
  3. Scientific Publications Oxford – London
  4. Optics and Refraction A User-friendly guide David Miller 1991 Gower Medical

Our Main Teachers

sourajit kumar banerjee

assistant professor
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