Recently, a patient came in who is a 54 year old helicopter pilot. He is currently wearing a multifocal lens design (R&L +0.50 Add +2.50), but requires clear distance vision in the horizontal merdian, and as well in the right inferotemporal field for visual landing approaches. He has an instrument console at @45 degrees below the horizontal at @65cm, and also another intrument console @20 degrees above the horizontal at @30cm. Manifest refraction R +0.75/-0.75x122 L +0.50/-0.25x55 Add +2.50 @40cm.
I am thinking of putting him into a 28FT Bifocal Add +1.75, high set, into a large aviator style frame, so there is adequate inferotemporal field. I have not had great experience with occupational reverse segmented lenses ( for the superior near field), and would ask anyone who has had success when prescribing these lenses.
Many Thanks.
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