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Lenses for Presbyopia - Coggle Diagram
Lenses for Presbyopia
Progressive
Types
Hard
Soft
Personalised
advantages
no visible line
No jump effect
Smooth transitions from dist to near
comfortable intermediate vision
Wide range of index
Design
Digital lens
Officelens
Long Corridor
Short corridor
Disadvantages
difficult to dispense and to check power
hard to adapt
high distortion
difficult to explain to patient
Swim effect
expensive
Not suitable for monovision, strabismus or BV problem and very high astigmatism
Single Vision Lens
Advantages
easy to transfer (much easier)
easy to adapt
available in ready made
easy to check power
cheap
no distortion
wide range of selection (different index)
Disadvantages
correction only for one vision
patient looks old (cosmeticaly not really good)
not suitable for high myope
Bifocal
Advantges
convenience
no distortion
Suitable for geriatric patient
Easy to adapt
Cheaper than multifocal
Disadvantages
cosmetically not good looking
no intermediate power
limited field of view
sudden jump image
visible line
easy to collect dust at the segment
Types
Curve top/ round segment/ Kriptok
UD bifocal/flat top
Blended
Fused
B segment
Executive