-ics, -tics [-ac after i]

(Greek: a suffix that forms nouns and is usually used to form names of arts and sciences)

optogenetics
The science of isolating and communicating with specific types of neurons using light with a combination of optics and genetics that may allow neuroscientists to identify and to control brain circuits with greater precision.

Because of specialized hardware applications which need to be developed, it may be many years before optogenetics can offer a reliable diagnosis, much less any definitive cure for Parkinson’s disease or any other major brain illness or disorder.

—Compiled from information presented by
"A Light in the Brain" by Gary Stix in Scientific American;
January, 2010; pages 10 & 11.
and
"A healthy future for optogenetics" by Jeff Bairstow;
in the Laser Focus World; August 1, 2009.
optotechnics
The technology of optical instruments and apparatus.
orchestics
orthetics
The study and applications of orthopedic appliances and their uses.
orthodontics
1. The branch of dentistry dealing with the prevention or correction of irregularities of the teeth.
2. That branch of dentistry that specializes in the diagnosis, prevention, and treatment of dental and facial irregularities.

The technical term for these problems is malocclusion, which means "bad bite".

The practice of orthodontics involves the design, application and control of corrective appliances (braces) to bring teeth, lips and jaws into proper alignment and achieve facial balance.

orthogenics
Eugenics or improvements in the genetic constitution of the human species by selective breeding.

Orthogenics refers to scientific endeavors to increase the proportion of people with better than average genetic endowment through selective mating of marriage partners.

orthokinetics
1. Various tactile stimulation techniques used to stimulate the proprioceptors (sensory nerve endings that give information concerning movements and position of the body) of muscles and tendons and thereby enhance motor performance in rehabilitation.
2. Referring to or having movements in one direction; as, molecules or particles.
3. The dynamic use of an orthotic device to facilitate movement of one muscle while inhibiting its antagonist, as a treatment for spasticity.
orthopedics, orthopaedics (British)
1. The branch of surgery which is concerned with the correction of skeletal and spinal deformities; especially, in children.
2. The medical specialty dealing with the preservation, restoration, and development of the functions of the skeletal system of the body, its articulations, and associated structures.
orthoptics
1. A method of therapy intended to train the eyes to achieve improved muscle balance and binocular vision.
2. The science of correcting defects in binocular vision resulting from defects in optic musculature.
3. The technique of eye exercises, or orthoptic training, for correcting faulty eye coordination affecting binocular vision.
orthotics
1. The science pertaining to mechanical appliances for orthopedic use.
2. The use of orthopedic appliances.
osmics
1. The science that deals with smells and the olfactory sense.
2. The science of the sense of smell.
otiatrics, otiatric
The nature and principles of the medical treatment of the ears.
pataphysics
The French absurdist concept of a philosophy or science dedicated to studying what lies beyond the realm of metaphysics, intended as a parody of the methods and theories of modern science and often expressed in nonsensical language.
pedagogic, paedagogic; pedagogics
1. Of, pertaining to, or characteristic of a pedagogue or pedagogy; having the office or character of a pedagogue.
2. The science, art, or principles of pedagogy.
It is a pity that so many children and young people go to school without getting an education.
—Anonymous
pedeutics, paedeutics, paideutics (pl) (noun) (a plural used as a singular)
The science or art of education.